There was a period where they were left out as a "wartime manufacturing expediency". The dates escape me at the moment, but they were re-instated when Slazengers took over wood production IIRC.
Point of interest, there were a lot of coachwood foreends about a while back, raw timber, no recoil pads fitted and all 1942 dated. It was a supply of these which were used by John Jovino Co to assemble many rifles from parts he bought from the Aust.Govt. The absence of the recoil plates and more so, a suffix on the serial number were the ways of identifying likely JJ Co built rifles.
Son before I make a suggestion why, I need to confirm, who installed the plates, Slazengers or
Lithgow
after receiving to forend from Slazengers?