I wonder if they did this so they could use the same sapphire crystal as the PO? With the stock SMP crystal, the PO bezel does raise the insert about a half-mm higher. I guess it's possible that making the bezels that much taller was cheaper than making two different types of crystals, especially now that the 1120 SMPs are all discontinued?
Other than that, the important question is if the 2500 SMP bezel fit on your 1120 SMP? If it did, the transitive property of Omega bezel fitment strongly implies compatibility of the 2500 SMP with the PO bezel, which suggests that the mod is still feasible. Most probably.
That is a very nice watch. I was thinking of going the white gold bezel on my black GMT but the PO bezel looks awesome.
I really need to try and get a couple of more hours of sleep in, but I'll try to answer as completely as possible now. (Insomnia sucks.)
I had the old and newer style bezel assemblies on the counter, side by side, and we studied them together. The newer, 2500 assembly was definitely at least 1 mm taller, maybe more. So, the 2500 bezel assembly, on my 1120 case and with the 1120 crystal, sat about a mm proud of the crystal. It was totally noticeable and looked ridiculous.
It would make sense, what you suggested, but I don't think sharing crystals was the primary concern when they decided to make the newer SMP's bezel assembly taller. Since they had to make the case a bit taller, to accommodate the thicker movement, they likely decided to make the bezel assembly taller to keep the proportions. Then, it's entirely possible they just made the new assembly the same height as the PO's, in order to simplify crystal production/sourcing.
This is what we know, for sure:
1) 2500 SMP bezel assembly is definitely taller than the 1120 SMP's.
2) 2500 SMP crystal is also taller than the 1120 SMP's.
3) PO bezel assembly is taller than 1120 SMP's.
4) PO crystal is definitely taller than the 1120 SMP's.
What we don't know, with any certainty, is whether or not the 2500 SMP's bezel assembly and crystal are the EXACT same height/thickness as the PO's.
Hope this helps!
I simply put a non-AC Dial on my 2254 and it really looks great. Good luck, Miki
also which of the current Seamasters have the 1120 movement? I'm on the Omega site and I just see 2500
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