It is consistent with the early LB snipers assembled in
Canada
Canada DID NOT solder the pads on the No.32 mount set up and this caused a real sh*t storm with the British.
Apparently the screws were loosening as well as shearing off and the Brits were NOT HAPPY!!!
I have some of the correspondence on this faux pas and it was much later when Canada finally complied.
I am thinking late 43/early 44. I do stand corrected as just a guess until I drag out the records.
Most of the 32 TP set ups were also not soldered but they had the addition of the hardened steel dowel pins.
I THINK I have the letter stating the compliance date by Canada to solder on the pads and will look for it shortly.
The earliest LB mount I have with a number on it is 36LXXXX
If any early LB pads are soldered, they were done in
England
and NOT Canada.
PETE: Please check the rear sight and see if it is British or Canadian.
I supplied a couple of dozen Mk.1 sights to that region many years ago as most of the Mk.3 sights had the stamped eye piece broken off.