Have several. One similar to the one pictured, dated 1915 and also BSA
One a Martini Henry
And one No1Mk3
All have the plunger with the knob on the end.
How I got the Martini. When IMA first published the Nepal Cache of Martini's their promo ad showed two guys posed with the fencing muskets. Immediatly emailed them that I wanted one. Kept bugging them for around two years until they finally gave in. Obviously they were more interested in selling complete rifles.
Bought the BSA in the U.K. On arriving at Heathrow with it in a hard case I was asked what was in it. Told them it was a fencing musket and offered to open the case. No, please follow me. Went through various rooms until I was allowed to open the case with this "DANGEROUS WEAPON IN IT!:rolleye