Omega Seamaster Frankenwatch - WARNING! Ebay item #231438354785
If you purchase this watch you are getting three different watches all for the price of one! I don't personally know the seller and they may have no idea. This is why I built my data base. It just took me a few minutes to look up the caliber and case numbers to figure out this would not be a good purchase.
Here is an example of what the case back should be on 2849-3 SC belongs on a Seamaster Calendar date at 3. Item #393 on my database at omegaaddict.com