Come on @RIP. If your asking collectors who have spent years of time, effort and their hard earned cash to earn their knowledge the hard way, to help you in your search, the least you could do is put a bit of effort into your request. What’s the background to these watches, are they for sale or have you bought them, what’s the price and most importantly, what do you think about them??
Ok. The 903 has a standard pie pan 18k dial. The 004 has a rounded pie pan dial that is not favoured by many collectors. What else should I say?
I‘ve seen the listing. You might want to post the picture of the case back as well, which would be a no-go for me.
the two have similar caliber 561, highly collectible as chronometer grade, both have similar piepan dial but not one is gold. no pie pan dial is made of 18k gold afik because of the sharp bended edges. the 1st one has a crab-leg lugs (and original crown), while the 2nd is not.
The Grand Luxe & De Luxe pie pan models did come with 18k dials https://download1648.mediafire.com/...0d9l7/Omega+Constellation+Deluxe+Dials+V4.pdf