Andrew Nethercott Antiques has dated this piece to the 1920s.
The flat lid engraved:

DERVISH
1901 - 1923
Well made example also with silver hallmarked horse shoe
Removable silver plated inkwell liner.
Length 5,1/8" or 130mm
Weight 471g
Nothing loose, in very good sound condition.
Not recently cleaned or polished, retaining good sharp details.
Good and tight, rocks slightly on the base, probably due to shrinkage of the hoof, nothing bad.
Andrew Nethercott Antiques has dated this piece to the 1920s.
Works of art, collectables, scientific and decorative antiques from the 17th - 20th century
You can view the stock and full dealer information on the Andrew Nethercott Antiques Profile Page