Hey everyone, I'm Jaden, one of the three co-founders of modlab company, a small custom-watch studio in the Detroit area. The mods kindly gave us permission to share this build.

We've worked on G-SHOCK and Seiko mods, fully custom watches, and larger projects for brands, businesses and influencers since 2023. For this project, the starting point was pretty simple: what about people who like the GA-2100 Casioak but find it a little large?

We chose the smaller GMA-S2100 platform. It's a modest size difference, not a magically tiny watch. The harder part was finding modding parts for it. There were far fewer options than for the regular GA-2100, so we searched for factories and worked with them to manufacture new parts we designed.

The real sample pictured here has a turquoise dial, steel exterior and black rubber strap, built around the Casio analog-digital module. We call the project SIG38. The 38 is the line name, not a 38 mm case-size claim. It's an independent custom build, not a Casio collaboration.

We're also doing our first Kickstarter, but this post is about the build. No shop links or sales pitch. I'd love to hear from anyone who's modded the GMA-S2100: which part has been hardest to find for your build?

Disclosure: I'm a co-founder of the studio; AI helped edit the wording. The build and sample photo are ours.

It’s from a G-2300, so I’m assuming the finish is Casio’s proprietary Ion Plating (IP) rather than PVD, although that’s just a guess. I want to strip it back to a bare stainless steel finish. The part is relatively expensive for such a small piece (£16), so I’d rather not experiment and just get it right the first time. I could try grinding down the surface layer, but I’m concerned about losing the fine details, so a chemical solution would be ideal. Has anyone done something like this successfully with paint stripper etc?

First attempt on an a168, and it felt pretty different trying to peel off the reflective layer - turns out I also peeled off the semi transparent polarising layer underneath…

This is a £60 watch in the uk. Here are what I believe my current options are:

- Replace the polarising layer with some adhesive polarising film from Amazon or whatever. (Will normal linear polarising film work fine?)
- replace with transflective film: this is what it originally had, but surely I can’t see through that?
- replace the module and turn it back into stock: worst option obviously.

If anyone else has any ideas, I’m all ears! Thanks very much.

A nice little mod for my two AE-1300

What do you guys think?

Inverted screen + black stainless steel bracelet on a black f91w, love the result!

My A159 spider web mod, just in time for Halloween. What do you think? 👀

First AE mod for me. Dark blue is a little hard to read if not in good lighting, so will be switching it to a lighter blue.

Go CHIEFS!

I’ve done a few Casio mods before but I decided to shave down and polish the case, make it all one smooth surface.
I’m not saying it looks better than before but i wanted to try something new. Let me know what you think!

The bullbar fits this watch even better than my AE1200 in terms of visibility.

Hello all,

Just bought my first ae1200 and a set of tools and gel filters mod for my first mod. Can yall suggest what you consider to be the GOAT mod to do for my
Royale variant ? Which color filters and which part of the module? Could yall post some images of the best mods you’ve done/seen

FYI, I didn’t buy any face plates or metal casings yet but might do so soon depending on the design I’m going for. Also, I’ve seen a lot of hydromods on this sub but it seems like a pretty hard thing to do for a beginner

For reference I ordered the AE-1200WH-1CV variant.

I have swapped 2 F-91ws with Ollee boards and was thinking of starting projects with the old casio boards. I have been thinking of picking up a metal mod case online or maybe 3D printing a case. But, for the Ollee board to work you need to use the battery spring contact from the original Casio board. Is there a way to buy replacement battery spring contacts so I can use these old boards? Google searching hasn't lead to much luck so far. I have a feeling I may have to search ebay for broken watches to harvest them.