This is a modular Wrist watch with geiger counter inspired by Metro series.
The whole concept is modular, making it possible to change between geiger counter, mobile phone or any other device.
I've printed the model with Prusament PLA Mystic Brown to look good but it might be wiser to print it with PETG since the PLA is not suitable for outdoor use.
The wristwatch holder (drzak_hodinek.stl) should be printed with flexible filament.
Some sanding might be required for railings (depends on your printer accuracy).
For cellphone holder locks use M3 screws and long springs: Those used for MK3 idler are too strong, use springs from old pen instead.
The author hasn't provided the model origin yet.