STEN MK II Marked “ENGLAND” on Trigger Housing

Hello all! Does anyone know if original WW2 production STEN MKII’s were ever stamped “ENGLAND” on the trigger housing. Here in the US, several C&R transferable guns seem to have that marking which definitely looks hand stamped yet I see no reference at all to it in Peter’s book. My thought is the “ENGLAND” marking was applied when guns were originally Dewatted. Here’s a link to a Morphy auction for a STEN that has the mark? https://auctions.morphyauctions.com/_N__ORIGINAL_BRITISH_STEN_MK_II_MACHINE_GUN_WITH_P-LOT490232.aspx

Any thoughts?

Here's a live link while it lasts. Lot Detail - (N) ORIGINAL BRITISH STEN MK II MACHINE GUN WITH PARTS KIT (CURIO & RELIC).

I thought the England stamp was a pre 1968 US import requirement, so stamped by the importer??

I think Mr Clark is right. I think this was most likely applied by Interarms pre 1968. It’s mentioned the book Deadly Business that Sam Cummings bought a lot Stens from the British government and the Finnish government the book Deadly Business.