Kuduae,

This is not a Martini Henry. This a Sporting Pattern Martini. I don't think this is a detachable lock as the safety makes that difficult. But it could be-Francotte and Belgium's had a number of clever variations.

The Afghan marking seen to indicated something other than a run of the mill sporter. The Mosque was applied to the government arms. I had a Kukri with that mark-the ruler used Gurkha body guards. And of course the Kabul Arsenal guns all bore this mark. But this is not a Kabul Arsenal gun.

This is a very nice gun.