This Edwardian whip has an antler or staghorn handle.
There is a crown shaped steel "gatepusher" on the top of the staghorn.

 It has a 15 carat gold collar stamped around the edge" Swaine & Adeney Ltd, London".
It is hallmarked London 1902 and stamped 15 and with the silversmith's mark "EHW".

It is engraved "S.M. from E&C.S 1904"
The shaft or stock is covered in brown braided linen or hemp.
The whip has a stitched keeper in bridle leather and a braided leather thong with a bound repair at its end and a cord lash.

Dimensions : Staghorn handle : 5" (12.5cm), Length (not including keeper) 23½" (59.5cm), keeper 8½" (21.5cm), Thong not including lash 52" (132cm)
Weight 355g (12½oz)

Ref : whip1719