Well, guess my memory wasn't too bad. I found posted earlier this nice example in John Gibson's collection online, dated "early-mid '60s." I would guess the plate is mostly limited to combat handles though ... interesting question.



http://www.militaryfightingknives.com/collection.html#Randall

"Randall Model 14. Made aprox early 60's. The knife has a 7 1/2" Stainless Sawback blade with the "Low S" mark and a brass hilt. The handle is black micarta with an inlaid name plate. The sheath is a Johnson Large Rivet, Split Back with early leather lacings and a 2-tone gray stone."