I'm looking at a used Speedmaster Reduced II 3539.50 from trusted eBay vendor sabashioyakiz1. It looks to be in near mint condition and is a complete kit with box/papers/warranty cards. I have some concerns stopping me from jumping on it:
1. It is missing the "anti-counterfeit" globe etching on the caseback. I suspect it was polished off during service. Is there any other reason this would be missing? Every picture of the 3539.50 caseback I've been able to find has this etching.
2. The seller claims the watch has been serviced in January 2019. He does not have any paperwork for this service and is going off of what is written on the underside of the caseback. Can this be trusted as a legitimate service record?
3. As he removed the caseback to provide me with the picture, does the rubber seal need to be replaced to maintain water resistance?
Thanks in advance for any insight!