This whip has a staghorn handle.

There is a crown shaped metal "gatepusher" on the top of the horn
It has a silver collar which is hallmarked London 1909 and stamped with the silversmith's initials "W.B." 

The collar is also engraved "Geo. Schomberg Makers, Brompton Rd., S.W."
There are a few small dents and dings on the collar.
The stock or shaft is covered in plain leather with a finely stitched seam.
It has its original open leather keeper.

Dimensions : Staghorn : 5¼" (13.5cm) Length (not including keeper) 21½" (54.5cm), keeper 6¾" (17cm)
Weight 242g (8½ oz)

Ref : whip1620