Sterling Silver Cork Screw Equestrian Silver Cork Screw Vintage Bottle Opener

This is for a Vintage Sterling Silver Equestrian Boot Bottle Opener / Corkscrew from R. Blackinton & Co Silver. The Corkscrew is hidden in the case / the boot. The piece measures: 3 3/4 tall x 1 1/2 inches wide. This is marked 738 and patent applied for. The handle on these is not marked and unsure of the metal, could be sterling but darker as was tarnished more. The weight of this piece is 158 grams. What a nice gift this makes for dad or any one wishing to be a cowboy or cowgirl! All items are vintage and