Screw-Hole is 1.055 scaled just for your information
You should print on finest setting, or maybe use a SLA pinter if you possess one ...blender project file attached for make a more stable struts in the ExzenterGuide_Height ... Or leave it as it is
You will need M3 Screws for the Wall-Mount (Hole is 3.5⌀[mm] TRUE)

You will need TO print:

• Wristband-Holder1_fixed (Print with PLA with 101% because of the screw)
• Exzenter-Guide_Height (This is the thing that holds the gear and the worm simultan. )
• nurGewinde (This is the screw you have to insert a lego axis into, i haven't test it, the medium or the smaller one. The thickness your watch is approximately 4-5 [mm] i mean where the wirstBAND is..) I will edit my exp.

You will need at home:

• Lego Gear
• Lego axis, cross-axis
• Lego Worm

Advertisment text:
I had no place where i could put my digital wristwatch out of the way... Don't hang me. It was my first time bending in Blender with the remix watch-holder from the remix. Because of my felonious untidytalentpool I decided to bring a wristwatch on the wall. I'll use the watch as a handy wall clock, because some I don't wear that much, and in the fashion I can look at the time when I leave the ROOM, switch the Light, get the keys, etc. In the photo is not my wristwatch shown.

• Wristband-Holder is the solo holder without any mechanics.
  Hɐʌǝ ɐ nıɔǝ pɐʎ :/)