microSD-card holder for Swatch YIS401G metal wrist and alike

Be aware, there's some spy stuff on the table. :)

This is a microSD-card holder which fits into the closure of the metal wrist of a Swatch YIS401G or other watches with the same metal wrist.

There are two parts: The outer part fits into the metal wrist (can be "clicked" in) and must not be pulled out again afterwards. You put the microSD-card into the inner part, and that one fits into the outer part. You can move the inner part a bit, so that you can lock it. The microSD-card stays in pla