Adam, congrats on your new gig.
I don't understand how that oil and grease got in there, how would this even be possible?
Because when the gasket is out of service, the caseback can be attacked by the rust (it happens to mine so now i have a service caseback). I wondered that due to the movement's condition
Ah I see, water fresh/salt doesn't really do anything to the case itself. However certain owners sweat can be acidic and this will eventually eat the stainless steel and cause corrosion. Often watches from hot humid environments exhibit this kind of problem.
... I have been pretty crazy with lots of work coming in. So much so that I've quit my normal day job and taken up two days a week at a local watchmaker workshop who was factory trained by Rolex. The rest of my week is taken up with servicing and restorations from my own clients.
This 65 Speedmaster is in a pretty poor shape and I thought you guys might like to see the first few steps of its restoration and service. Not all 321's have survived the last 50 years in perfect condition...
, then there's service like what I expect 
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