Probably when I was eight in 1970. Typical silver face Marlin. Had it forever. Went through several bands. Remember those little metal clip-on calendars?
What I don't remember is what came next. There's every chance I kept it till the Ironman came out.
The one I wish I'd kept: I remember Dad briefly had a heavy steel unit with a red led readout that you had to press a button to see. That would have been around the time you still had to plug calculators into the wall. Very cool, and instantly forgotten when we got quartz.