Putting the Casio F-91W band on an Apple Watch

I love the Casio F-91W. After getting one in high school, I wore it all through college and continued to until upgrading to an Apple Watch earlier this year. I love the Apple Watch too, but often miss the feel and the simplicity of the Casio.

Casio F-91W

In order to get a bit of that feel back, I decided to put the band from the Casio on my Apple Watch. I figured that there would be plenty of examples of people doing this online given the popularity of the F-91W. To my surprise though, I couldn’t find anything at all about people doing this, so I decided to do it myself and post this for anyone else who has the same idea.

I don’t know a lot about watches, but I learned that a lot of watch bands seem to use a somewhat standard mechanism that you can get Apple Watch adapter for.

Casio and Adapter

I picked up a set of these adapters on Amazon. (There are dozens on there. This is the one I went with but as far as I can tell they’re all pretty much identical.) I tried attaching my Casio bands to them, but the pins included with the adapter were about twice the diameter of the holes on the bands. This was a bit discouraging, but after stretching the holes a bit with a drill, I was able to fit the pins in just fine.

Drilling the hole

Final top view

Final side view

These were the most narrow of the adapters that I could find, but as you can see they’re still a few millimeters too wide. I may try doing something to clean that up in the future, but for now these are working great!

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