Antique coin "safe"

Little combination lock "safe" with slot for coins in top. The inside front panel is kind of messed up in that it can move around when trying to unlock the box. Perhaps lubricating the latch mechanism would make it work better? Also, we're not certain of the combination... we've been able to get it open with a few options. Made in Japan From my brief research it seems to be from the 1940s or 50s and made of tin. "Star savings safe"