Gold , is working but stops after a while , number on mechanical part is 2215677 and a number on the inside back panel is 1295432 it has a coins edge around the casing , it's 17 jewels , there are a few other numbers engraved on the inside of the back panel as well. On the inner face over top of the number 11 is a piece missing
2" round by 1/2" thick
Great grandfather