Ralf, Jeff... I love that model... I love the almost "Micrometer" precision surgical look of the entire execution of this watch. I actually own (or owned) three examples of this case reference (one unfortunately is and has been Missing for a couple of years) in the Heuer dialed model, and own a Near-Mint Tourneau version...

I have a very busy day scheduled, and I may not get to it today, but I will try to take some pictures of my 510.xxx's tonight or more likely tomorrow for addition to the 510 series section... I have an example of each reference number but not necessarily each variation made (because there were Day-Date Heuers, Date only Heuers, Date Only TAG-Heuers, Tourneau's, etc...) well, you get the idea.

Is is possible for us to get a "poor-man's" section for the Tourneau versions (with a link to the Heuer section as well?

Maybe I'll take a family shot if I get the chance...

-- Chuck