Recently noticed something that is very interesting in my opinion. I have stumbled upon a couple of 2998-4 in the serial range 17.764.xxx Both examples appear to have a case-back with particularly asymmetric bevels compared to standard examples. If anybody happens to have noticed something similar or can provide insight would be much appreciated!
Same here a few more 2998-4s that come with this big-bevel case back and two of the three below with serial 17.765.XXX. Also one from this thread a few months ago: https://omegaforums.net/threads/omega-speedmaster-2998-4-value.143835/ Notice some similarities like the hard stamp on "2998 - 4" and the more centered perlage polishing inside the case back.
Maybe a different batch of production? Thank you Matteo @The Master of Speed for sharing this infos to us. You have the eagle eye