Depends on which reference book you read.
I think one source claims 1920-1980, while another claims 1950-1960.
I'm not familiar with the maker, but in just looking at the knife it appears to have iron bolsters and liners which is typical of wartime production.
The shield is pinned on.
I'm getting the vibe of post-WW2.
Perhaps early/mid 1940s to early 1950s ?