Hello Folks, as the title says I'm trying to identify a HW77 that has come into my possesion. It's a .22 and the serial number is 1191744. I think it may be a Mk 3 as it doesn't apear to have a rear sight fixing point, only a scope rail. I'm trying to identify it so I can buy the correct piston seal as part of it's refurb. Any pointers much appreciated.
Bill
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