Cover for the battery compartiment of old Nintendo Game & Watch games. edit I found another one on thingiverse made by "wizard23" in 2008: http://www.thingiverse.com/thing:255 Did not test this one out, I created mine before even noticing there was one already :) Designed and printed @ 0,075mm, did the job just fine as you can see in the pics. Hopefully I can help someone out who lost some covers. Made using Sketchup.