My constellation collection is very early 1950s centric but I am always on the lookout for the nice looking mid-60s piece. This new arrival (came today) is 18k YG with the nice lugs and the gold piepan dial and I believe it not only has all the original parts but more importantly, it has not been polished and appears never to have been serviced. All I did was clean up the exterior with some cotton swabs dipped in water as well as polish the crystal.

 

The interesting thing that I've never noticed before on one of these is the alternating brushing with vertical grain on the center of the dial and concentric brushing around the edge to give contrast, very nice indeed, and sharp lugs too.

 

Hoi,
The dial on the watch has onyx inserts and are not painted on. Haven't checked the dial back but no reason to think it isn't an 18k dial. It is a 14900 case reference which is a rather case reference to be seen with this dial style.

 

The later models had larger inserts but those were the on the later date dials. The earlier non-date dials with these markers (as well as the cal. 504 deluxe dials) had smaller onyx inserts. Here is a cal. 551 watch I have with a non-piepan dial in 18k rose gold:

 

I had posted on this thread , but it disappeared. Great pick-up as usual Mike, You are the master of finding these gems.

 

You can ask, but it doesn't mean you're gonna get.

Another brilliant pick-up, Mike,
gatorcpa