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14 July 2022, 09:45 AM | #1 |
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Join Date: Nov 2020
Location: Caribbean
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Zinc sulfide production years
Hello guys!
Just a quick question: is is possible for a 1675 serial 1.802M to have zinc sulfide? That serial would place the watch around 1968. Asking 'cause I have seen many '68s 1675 without it. So, is it possible that back then there was an overlap using two compounds? Thank you! |
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