Hey Fabrizio. Look closely at the case on the Golden Hours watch - it's not the same case as the 510.50x watches, it's the 70s Carrera case from an 1158, albeit with the cutout for the crown amended to be on the right-hand side.

Golden Hours case:

Carrera 1153/8 et al case:

So it's already in a Carrera case, it's but a small step to call it one... In fact, less of a step for this watch than the 510.511 and 510.523 Carreras, as this one uses an already familiar case whereas that cushion one was all new for the Lemania 5100. Makes you wonder why they didn't use that case for them too as the movement clearly fits, but perhaps that case in PVD says "Monza" too strongly.

: As for a contest between the Pasadena and the 510.501, I may
: certainly be biased towards the L5100 but it's really no
: competition in my opinion: it's the 510.501 a thousand times
: over - fluted pushers, much brighter dial and of course a L5100
: at its heart. And I do own a Pasadena as well, and I like it...

What David is getting at is that Heuer seemed to have made the conscious decision to make a break from using names and instead to use numeric codes. What could have been called a Carrera was called a 510.508, what was a Pasadena became a 510.501. Sure, some numbers can be evocative - 911, 328 anyone? - but in the watches, it's the names that rule... most of the time. Of course, they then did call other watches by names in the same period, indicative of the chaos in the Swiss watch industry at the time!

All said, I still really like the watch - who'd have thought such a technical movement as a 5100 would look so at home in a gold case with a champagne dial - but if it was a Carrera, I would long for one and that's the difference right there!

Mark