Thanks Paul & Mark,
Interesting stuff... I didn't know the snap back were larger!

I do have a 3646, and you're right, it isn't huge, but sits nicely on the wrist.

Stewart

: I believe so, but don't own any to cross-check. There may be a
: difference in size between the screw caseback watches and the
: snap ones, though the latter have differently shaped, more
: angular horns. I would say the earlier case has hornier lugs but
: it might be misconstrued!

: Have you seen and handled any of these? If not, they're not as big
: as you might think they are, certainly not by 2000+
: sensibilities.