Swartchild
Swartchild Black Shield Mainspring for 6/0s Benrus 1939 - Steel
Swartchild Black Shield Mainspring for 6/0s Benrus 1939 - Steel
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$5.00
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Swartchild Black Shield Mainspring #441143 for 6/0s Benrus "1939" wrist watch, steel, new in envelope. A little puzzled by the "1939" as this is not related to a specific caliber, but given how Benrus watches were assembled and put into US made cases, I'm betting this will fit just about any early 17j 6/0s Benrus from that approximate vintage. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.