Movement looks good from this view certainly - some corrosion in the case back groove but that's not unusual. Leaks in the crown or alarm button gaskets though may cause corrosion on the perimeter parts that can't be seen until the movement is out of the case though. Just something for your watchmaker to check on.
For example this one looked pretty good too...
But when I removed it you can see the corrosion I'm referring to here (there's a screw there that's pretty rusted):
And deeper in more corrosion:
Certainly not seen on every one of these I've done, but not an unusual thing either. Just like any watch once the seals go water can get in and cause problems.
Cheers, Al
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