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accutron sealant

hi ive just got a 1974 ladies accutron calibre 2302.when i opened the case to see if the battery was in it [which it was], around the circumferance of the case was a black sealant type stuff which was still soft, could anyone tell me if this is a common practice to put this type of thing in.

                   

 

 

Reverend Rob's picture
Reverend Rob
Panel Member
Posted January 31, 2019 - 1:28am

This is a gasket which has chemically broken down into sludge. I'm not sure what causes this, but I have seen it many times. It needs to be cleaned out and a new gasket fitted.