We are hoping to identify the maker of this unusual piece to hopefully find a mate. This is a silver shaker of some kind.

It stands about 3 inches tall, it has 3 holes on the back across the shoulders. On the bottom there is a small door that slides to one side to put something inside.

The bottom is marked sterling 950 and a symbol which looks to me to be a Y with either a circle of M or w around it. Any suggestions as to the Maker? Thanks in advance for any help!
Sincerely,
Jayne