Hi! From what I see online regarding the g6232, you need not be concerned about the missing seamaster wording. The crown also looks ok to me. Here is a good reference example sold here on OF:
https://omegaforums.net/threads/omega-g6232-cal-354.37673/
It also has the correct cal 354 movement, though from the picture you cannot see the balance or regulator. Someone else here may be able to tell you if its a redial or not...I cannot tell from the pictures.
Regarding the 'bay, there is a great thread somewhere here on OF with some good best practices. For me, I always let the pictures cary more weight than anything in the description by the seller. I do check feedback and look in particular that it all did not come at the same time. I read any negative comments and also a subset of the positive ones to get an idea of who I may be dealing with. On the negative ones the seller's rebuttal often tells you all you need to know. Quantity is also important, and longevity. I also check their other auctions to see if there is any indication of "schilling" (using multiple accounts to artificially increase bids)...a good example of this and some other things to look for are in a thread from earlier today called "I wish sellers on Ebay would stop...". Finally, you can ask the members here as if the seller has been doin this awhile, someone here has probably bought a watch from them.
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