Unusual Sherlock Holmes Vintage Silver Charm with Violin

Unique and collectible Sherlock Holmes Vintage Silver Charm featuring a pipe engraved with 'S.Holmes' to the front and Sherlocks inimitable Violin when you open the pipe. I had to have this piece as Sherlock is one of my all time Favourite Characters. I want to know are there any Dr Watsons out there who know who might have made this charm??
It is a super quality piece but I cannot find any makers marks and I would love to know who manufactured it.