Sorry as I don't have the 243......yet. But here's the 252 next to the 186. My 252 came from Robert about 6 months ago from his auction site. Paid $96 for it with a great case, decent movement, flyback case (incorrect) and black dial (also incorrect). It's my favorite watch by far. Sits much lower on the wrist with the flyback compared to the Tony special. However the dial and bezel on Tony's 186 appears to be more accurate. Especially when you look at the "S" on the bezel and compare to GEN. Much closer.
And now for the "you have a PAM problem" picture. And this doesn't include the 3 I've sold off in the last 2 weeks.
Oh and yes I know that SUB buckles don't belong on non-SUB watches, but neither do leather straps. LOL.