Where's my collar button?

I just had to share my latest purchase from a favorite eBay seller:

It's a small aluminum or tin box; the top is stamped, "Where's my" and then a collar button.  There are also some decorative incisions including a monogram.

I've decided it belonged to Frederick, Felix or Forrest.

It came with its own supply of collar "buttons" fasteners, really.

'Had to share.  So much fun!