I was browsing Chuck Maddox' key for the former Omega product reference codes (older 7 digit and more recent 8 digit) and realised that there is no explanation on the web of the new 14 digit codes (at least I'm not able to find one). So I decided to use my Sunday morning looking through catalogues and the Omega website to try and 'decode' the new product references, which I've summarised them in the following table.
There are a few items that I am not able to explain fully (particularly differing codes for steel cases and certain leather straps), however I believe that the rest of it is correct (no guarantees ).
I hope this serves as a good reference and useful guide. If anyone has any input to this, or indeed an official Omega document showing the breakdown of the codes, please post here or send me the details and I can update the table.