TPU Pocket Watch Wrist Adapters

TPU pocket watch to wrist strap adaptors. One watch I have was 49mm diameter, the other 51mm, both had 43mm crystals and Unitas 431 movements. The 51mm adapter is thicker around the watch crown on purpose, to keep the bow from flipping and making noise.

The strap slots are 26mm, which can fit 26mm straps I made, or both layers of a 22mm nato strap. Feed the lower nato strap layer and its metal loop through the slots first before threading through the upper strap layer.

Print TPU with supports. Automotive primer spraypaint seems to stick to TPU. I don't know if I would trust the layer adhesion of the adaptor strap slots if printed in other materials.