Muffet the dates I have on my 2 H barreled Mk III's
1916 5MD Lithgow4-1937
1945 OA (I think it is and not MA) 6-1959
The 1921 Lithgow is as it left the factory (Apart from the forewoods) and will not accept a .300.5' gauge in the muzzle its barrel is dated 9-21
These 2 live in the safe occasionally I get the '45 out for a bash but the '16 stays put.
The 1921 never goes out except for its 6 monthly oil wipe and BLOtreatment.
Purportedly my '21 has not been fired since it received the new forewoods the chap who owned it for 30 years informed me of such, he asked the previous owner who had it for yonks to which he replied he had never fired it either. (Came with '07 1921 Lithgow bayonet numbered to the rifle and a Dble stitch Lithgow 1921 Scabb.)
As it still has cosmolinegrease on it in parts there is no real wear on the left of the mag floor plate or other parts as you can see from the pics the grease still on the mag