Sorry do not know the serial numbers of the changes, but I believe there were around a thousand Shamal's made, my own Shamal that I bought from new was serial number 816.
Not sure if the Mk2 was an official designation, but the black breech block guns tended to be referred to as MK2's.
It wouldn't be unusual that some of the guns had been worked on so serial numbers may not necessarily relate sequentially now.
That right handed NJR looks to me like it is the brass breech version with that darker colour. The L/H version is quite unusual if it is indeed a .22!
Last edited by Dale; 12th November 2014 at 03:06 PM.