Mirrored Shadow Box - HospiceCare Thrift Store

I was so excited. I could buy a $25 gift card to HospiceCare Thrift Store for $12. I wish I would have thought to buy two. I ended up spending the gift card the day I bought it. I found a mirrored shadow box. At least, I think that's what to call it.

There is even a date on the back - January 13, 1955.

Can anyone offer any insight into this find? Maybe what it's called. Or how much it might be worth. Thanks.