While my eyes are fighting sleep im gonna guess that this is a vintage small toy, necklace or jewelry piece with a chime/noise making apparatus with a bell shape and what looks like a little clapper at the bottom that makes the middle section move and the noise it made would come out of the three slots. The four bent "teeth" indicate it may have been part of a locket or something else with a hollow section in the middle.
They had locks on photo albums as well. I have a family album with a more simple lock, but the pages are heavy duty compared to now days. They were able to fit tintypes and cabinet cards in the pages, but in this case, I think Charlie nailed it.