A159 "1950"
A100WE "Agent"
A158 "Vintro"
Welcome to Towers Watches
I'm Eric, and I've been modding my own Casio watches since early 2023. In June of 2023, I came up with the idea to start selling my custom watches because of two key reasons:1. There weren't enough high quality mods with cohesive, classic looks.
2. Narrow lug widths.
Hidden lugs
Unlike traditional round watches, most Casio watches hide their lugs under the case. This creates a "lugless" look where the strap blends with the case.For this to work, the lugs on most Casios are narrower than the case itself. This however means that the strap fitted between these lugs would also be narrower than the case.This is why Casio adds "notches" to their straps, which allow the wider strap to fit into the narrower lugs. For example, the F-91W features a strap that starts at 22 mm and tapers down to 16 mm, but the lug section that connects with the watch lugs is 18 mm.
What if you want to swap out the strap on your Casio for your own?
You get a rather disproportionate looking strap.Due to the 18mm lugs of the watch, you're stuck with fitting 18mm straps to the otherwise 22mm wide watch case, with the end result looking quite awkward.
The solution
Most people will simply opt for a standard 18mm strap to fit easily to the 18mm lugs of their Casio, while others will use adapters to fit wider straps to the watch. I wasn't satisfied with either of these options, so I began using the same method that Casio does to create its seamless strap look by manually adding notches to my custom straps.
The same way nylon straps are heat-sealed during manufacturing, I realized I can manually make notches in my NATOs by melting the material in the precise points I want to create notches, cutting them out, and heat-sealing again to finalize the process.Since 2023, I've been using this method to create notched NATO straps specifically tailored for Casio watch lugs, blending the strap perfectly in proportion to the watch.
The result
Custom Casio watches with straps perfectly tailored to their unique lug widths.Sometimes the strap doesn't need to perfectly reach the full width of the watch, as is the case with my Vintro mod, which features a 20 mm notched leather strap as opposed to the full width of 22 mm I typically have with my NATOs.Be it nylon or leather straps, cohesiveness is the aesthetic goal of all my mods, so I always pay attention to the proportions of the watch and strap, and notch accordingly.
© Towers Watches 2026 - All rights reserved
A159
1950
A callback to the golden age of mechanical horology
A158
Vintro
What if Casio started making watches 20 years earlier?
A100WE
Macintosh
What if Casio made a watch inspired by the original 1984 Macintosh 128K?
A100WE
Agent
Casio has history and reliability. Now, let's give it class.
F-91W(B)
Panda
Playful - yet utterly practical.
F-91W
Tactica
The Towers debut.
A100WE
Agent
Casio has history and reliability. Now, let's give it class.The A100WE "Agent" mod is a visual upgrade to the Casio A100WE model, a revival of the original vintage F-100. The resin strap has been replaced with a 20mm genuine leather crocodile style strap, hand-notched by myself to ensure a perfect fit to the watch. To complete the cohesive, covert look, the display has been inverted to blend with the rest of the black display.
Modifications
- Negative LCD
- Hand-notched 20mm genuine leather strap, fits wrist circumferences of 5.75'' - 7.5''
A100WE Specification
1. Dimensions: 40.7mm length x 32.7mm width x 9.2mm thickness
2. Battery lifespan aprox 3-5 years.
3. LED backlight illuminates display from both sides
4. Features include: day, date, perpetual calendar, stopwatch up to 60m, alarm
5. 3-bar water resistance
6. Accuracy +/- 30 seconds per month.
7. Chrome-plated resin case, acrylic glass display
Delivery
UK delivery: Royal Mail Tracked 24 (1-2 days after dispatch)
International delivery: Royal Mail International Tracked (3-7 days after dispatch)Note: if you are in the US, customs duties are prepaid. Otherwise, customs duties/taxes may apply. Please ensure you know the import rates from the UK for your specific country of residence before purchasing.
Note
Due to a busy life, I currently sell on an individual made-to-order basis. If you're interested in a quote, please contact me at: [email protected].All watches showcased will never exceed £300.
© Towers Watches 2026 - All rights reserved
A100WE
Macintosh
What if Casio made a watch inspired by the original 1984 Macintosh 128K?The A100WE "Macintosh" mod emphasizes the off-white tone of the A100WEF-8AEF watchface with a beige hand-notched 20mm leather strap. It also features a negatively polarized display, reminiscent of a computer screen when switched off. Classy yet casual, this piece will complement both formal and casual outfits.
Modifications
- Negative LCD
- Hand-notched 20mm genuine leather strap, fits wrist circumferences of 5.75'' - 7.5''
A100WE Specification
1. Dimensions: 40.7mm length x 32.7mm width x 9.2mm thickness
2. Battery lifespan aprox 3-5 years.
3. LED backlight illuminates display from both sides
4. Features include: day, date, perpetual calendar, stopwatch up to 60m, alarm
5. 3-bar water resistance
6. Accuracy +/- 30 seconds per month.
7. Chrome-plated resin case, acrylic glass display
Delivery
UK delivery: Royal Mail Tracked 24 (1-2 days after dispatch)
International delivery: Royal Mail International Tracked (3-7 days after dispatch)Note: if you are in the US, customs duties are prepaid. Otherwise, customs duties/taxes may apply. Please ensure you know the import rates from the UK for your specific country of residence before purchasing.
Note
Due to a busy life, I currently sell on an individual made-to-order basis. If you're interested in a quote, please contact me at: [email protected].All watches showcased will never exceed £300.
© Towers Watches 2026 - All rights reserved
A159
1950
What if Casio started making watches 20 years earlier?Inspired by the golden age of mechanical horology, the A159 "1950" is the unlikely pairing of Casio's retro digital watch with the aesthetics of classic black-gold chronographs from the 1950s.Modifications to the watch include an inverted LCD display, a comfortable 20mm alligator-style leather strap notched for a perfect fit, and an optional LED upgrade that replaces the original factory LED backlight with a considerably brighter amber backlight.
Modifications
- Negative LCD (display swap from F-91W for greater legibility)
- Hand-notched 20mm genuine leather strap, fits wrist circumferences of 5.5'' - 7.3''
- Optional brighter, amber colour LED upgrade
A159 Specification
1. Dimensions: 36.8 width, x 33.2 length, x 8.2 mm thickness
2. Battery lifespan aprox. 7-10 years
3. Green LED backlight - while not bright, it should be enough for most people to read out in the dark. See photos for demonstration
4. Module 593
5. Features: 12/24h time - day, date, year - stopwatch up to 60min - repeat alarm
6. Water resistance 30m/3bar
7. Accuracy +/- 30 seconds per month
8. Case material: chrome plated resin with acrylic glass
Delivery
UK delivery: Royal Mail Tracked 24 (1-2 days after dispatch)
International delivery: Royal Mail International Tracked (3-7 days after dispatch)Note: if you are in the US, customs duties are prepaid. Otherwise, customs duties/taxes may apply. Please ensure you know the import rates from the UK for your specific country of residence before purchasing.
Note
Due to a busy life, I currently sell on an individual made-to-order basis. If you're interested in a quote, please contact me at: [email protected].All watches showcased will never exceed £300.
© Towers Watches 2026 - All rights reserved
A158
Vintro
What if Casio started making watches 20 years earlier?The A158 "Vintro" (Vintage-Retro) harkens back to the classic, earthy hues of vintage 1950s watches, combined with the retro appeal of the iconic A158. The watch is set with a brown, 20mm genuine leather strap hand-notched by myself. The beige dial contrasts with an inverted display with yellow characters.This watch also features an optional LED modification - the upgraded LED glows amber and is considerably brighter than the original with little effect on battery. The LED mod is a separate option as it requires some careful soldering work done to the internals of the watch.
Modifications
- Negative LCD
- Hand-notched 20mm genuine leather strap, fits wrist circumferences of 5.5'' - 7.3''
- Optional brighter, amber colour LED upgrade
A158 Specification
1. Dimensions: 36.8 width, x 33.2 length, x 8.2 mm thickness
2. Battery lifespan aprox. 7-10 years
3. Green LED backlight - while not bright, it should be enough for most people to read out in the dark. See photos for demonstration
4. Module 593
5. Features: 12/24h time - day, date, year - stopwatch up to 60min - repeat alarm
6. Water resistance 30m/3bar
7. Accuracy +/- 30 seconds per month
8. Case material: chrome plated resin with acrylic glass
Delivery
UK delivery: Royal Mail Tracked 24 (1-2 days after dispatch)
International delivery: Royal Mail International Tracked (3-7 days after dispatch)Note: if you are in the US, customs duties are prepaid. Otherwise, customs duties/taxes may apply. Please ensure you know the import rates from the UK for your specific country of residence before purchasing.
Note
Due to a busy life, I currently sell on an individual made-to-order basis. If you're interested in a quote, please contact me at: [email protected].All watches showcased will never exceed £300.
© Towers Watches 2026 - All rights reserved
About
Towers Watches is a passion project started in June 2023 by Eric Thurn, making, showcasing, and selling high quality hand-modded custom Casio watches.Towers Watches stands out by making full-width, notched straps a standard in all custom watches on offer, as well as offering custom orders for those looking for something they just can't find anywhere else.All watches are modified by hand with great attention to detail, being thoroughly tested before and after the process is complete. Modifications include custom LCD colours, hand-notched custom straps, NFC chip installs, display and/or module swaps, custom lettering and repaints.
"Wonderful product. This watch got a whole different vibe. I already had the original one but
Agent | 05/25
Additional Information
Item condition / warranty
- All items sold by Towers are new, have never been used, and come with the original papers.- All items are fully tested prior to shipping - this includes functions, LCD display, sound and LED light.- I do not offer long-term warranty. However, I offer a 14 day return/exchange period in case any fault crops up within that time.- The modifications I perform usually involve opening the watch and modifying internal components, so Casio warranty is void.
Returns policy
I accept returns/exchanges within a 14 day time window in case of faults, in which case you will receive a full refund for the amount you purchased the item for, or the exchange item of your choosing plus or minus any price differences.A faulty product is defined as: where one or more of the aspects of the item received do not match the description, either functionally or cosmetically.If this applies to you, reach out to me at the address below.
Purchases / transactions
All on-site transactions and data are securely processed by PayPal. A PayPal account is not necessary for checkout, but can be used if you have one.
Contact
For any enquiries, custom orders, returns, feel free to contact me via email at: [email protected].
© Towers Watches 2026 - All rights reserved
Programming your NFC chip
1. Download NFC tag app
There are various apps that will do the job, such as NFC TagWriter available for both Android and iOS.
2. Set up app for programming
While steps may vary depending on the app, generally all of them will follow some variation of this process:1. Select "write to tag"
2. Select "new dataset"
3. Select the option corresponding to the type of data you're programming, e.g. "link" if you're programming a link.
4. If asked what tag type you have, select "NTAG 213".
5. When programming your chip, make sure to hold your watch steadily to your phone to ensure data is transferred properly.
3. Scanning your NFC chip
The NFC chip used in your watch is small and covered by the watch case and other internal components, so the range will be limited.The NFC component in your phone will be located in a specific place on the back of your phone, so if your phone isn't picking up the watch, move the watch slowly around the phone to find where it best picks up the watch. Note that phone cases can reduce signal strength, the more material is added between the phone and watch.
© Towers Watches 2026 - All rights reserved
Eric Thurn
I'm a marketing student, product photographer, and watch modder based in Exeter, England.I got my first Casio watch, the W-86, when I was a teenager in secondary school. Although it was very simple, I loved the functional, retro design. I didn't care much for watches at the time, but this unassuming timepiece was ultimately what sparked my later interest in horology.I've also always been a tinkerer, restoring old laptops and modding android devices since my teenage years.Today I am a major watch enthusiast. I particularly love vintage-style chronographs and field watches. But my respect and appreciation for the simplicity, efficiency and unique look of Casio's digital watches has never dwindled - only grown.It is no wonder then, that my history with Casio watches, combined with my background in technology and design has led me to this hobby of mine; watch modding, and the resulting creation of Towers Watches.
© Towers Watches 2026 - All rights reserved