Vintage 1977 British Gillette "Psycho" Tech Safety Razor w/Key England X1

Description

The date code X1 could represent 1952 but British Gillettes didn't use date codes then and the top cap has beveled side edges and I don't think they were manufactured like that till the 60s?  With that I'm going with 1977.
I didn't shave with this but the razor looks mint but who knows if it's ever been used?  There are some like blemishes throughout from the plating process.  There are 3 light pinholes on top off to the side a bit that may be from handling though?  You should be able to pick them up in a couple of pics. Other than that the plating is excellent.
The razor functions fine with the key provided.  I don't know anything about the key or who made it since I  couldn't find any info on it.  It's made of solid brass that's been polished with an insert in it for the lock.  It works great lock/unlock, open/close and feel like it goes with the razor.  If it's cranked down a bit when closing it will stay in there pretty good.
Thanks for looking and I may have some other razors for sale.