I was wondering if there was any way to tell if a watch is clean and worry-free, or if it needs to be serviced.
I've recently started collecting pocket watches, and bought a few vintage Elgins and Walthams off ebay. The sellers' descriptions all state that the watches were recently serviced, but from previous threads on this forum and plain common sense I know how unreliable their word can be (I try to look extensively for indicators that the seller is reliable before buying, but even that can be a crapshoot).
Other than the watch not working at all or obviously looking like it was dunked in WD40, is there any way to tell if a watch was actually recently serviced?
Any info would be appreciated. Thanks!