David is correct, these are re-issue buckles. I've dealt with Steinberg & Frazier before, they are superb.

Rich - you've bought from them before!!!! : http://www.chronocentric.com/forums/chronotrader/index.cgi?md=read;id=19228

: These are the reproduction buckles issued in the late 90's onwards
: but are very good. I've got a couple which I use instead of the
: originals buckle to save them getting damaged. The current price
: is pretty good and the seller is very good too in my experience.
: Remember though, these aren't vintage, the vintage ones have a
: sun logo stamped on them but these will fool most people unless
: they really study the Heuer shield which isn't quite as deep.

: David H
: :