Nice job of cleaning it up. The stamp means it was well worth resurrecting. Jerry have always tried very hard not to compromise on quality, despite losing the war and entirely having to start all over again. Rough finish suggests to me late 40s early 50s, and head shape plus English text; for n. American export.
This is entirely a guess but if such a head had been stamped Mauser, Krupp, Messerschmidt, Daimler, Bavarische Motor Werke or any such at the time they might not have sold very many, and yet many of these once proud companies had to make do with making inexpensive cutlery, pots and pans, cheese graters (and maybe axes) etc for quite a few years.