I do not think that the info ref these guns is accurate - I bought a MKII that according to records was from a time machine - five years ish before they were made ((I just wish I could find the bill, I know I have it but . . . ?

Have repaired/renovated a few (got one nickel plated - could be mine).

Still got my original (MKII with scope) plus a MKI I bought later. Read lots, looked into books, all confusion.