credit card caliper

This caliper is designed to be carried in a wallet (85542.3 mm).
It should have enough clearance to work. But it is not tested yet.

It is metric, has an original ruler without numbers, and created to be printed in a few layer in one area per layer, to avoid loosing precision in printing the scale. The lower scale is thought for a precision of 0.1mm, although it really depends on printer precision.

I did not go all the way to have a locking pin for measurement comparison. And the structure is not very reinforced. the deepness pin is a bit flexible, and i was forced to redesign it to be a bit rounded to force the creation of supports. First print detached from the platform.