Interesting ...
Here's a few pics from a related entry in the MKL. When John mailed the pics to us, he said the rifle butt was hand carved at Gallipoli (Had to be carved by a Maori but also note the thistle).
Regards,John Sukey's Collection of Oddities and Unusual Pieces (click here)
(Click PIC to Enlarge)
(Click PIC to Enlarge)
The owner was Clifford William Treweek and he was at Gallipoli.
(WW1 13/173 Army 1914-1918 Record 0115727)
Doug