Hello all:

This is my first post in this forum, long time lurker, although I'm an active member of WUS and other forums.

I am looking to add a 1976 Speedmaster Mark 4.5 to my collection as my birthday watch. I found one online and even though it all looks good, I wanted to double check with all of you here, since most of you are more knowledgable than me.

The watch looks like is in great condition, I don't believe the case has been polished, there's some patina on the hands/dial/lume, which I like. According to the owner, the watch was serviced less than a year ago, and he has documentation of the service. My biggest concern is that on the movement shot, you can see one of the wheels is rusty. I know it's a 40 years old watch, but is this a BIg red flag?

Thanks

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