This is a second version of my last mechanical counter.

in this one there is no need for magnets. the outer case is held together with two 3mm screws (20mm length) or supper glue (the old one had only glue possibility).

This is the old one:

https://www.printables.com/model/264614-mechanical-counter

i use it to countdown the days until my kids birthday (only in the last 99 days before the event.

i also use it for counting how many time I completed swimming from side to side of the swimming pool.

NO SUPPORTS. 

PLA.   

Brim ONLY FOR LEVERS.