I have question on this M42 cap. I bought this nearly mint cap a couple of years ago. The ex-owner explained that one of ventilation hole was unfortunately missing then he offered reasonable price and I made a deal with him. I was convinced at that time but now I am doubting his explanation. The reason why my doubt is there are no ex-holes at the position of ventilation parts on the both inner/outer side. In addition to that I have found very similar M42 cap which has only one hole on the right side. (same manufacturer)
Sorry for my humble English but any comment will be helpful.
Sorry for my humble English but any comment will be helpful.
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