Hamilton Dynavar 6/0s Mainspring No. 717201 - Alloy

Hamilton Dynavar Mainspring for 6/0s Movements No. 717201, alloy, new in envelope. A newer generic repackaging of what is most certainly an original factory 717201, correctly marked as fitting the grade 987S (and others). I specialize is hard to find watch parts and all watch parts are unconditionally guaranteed. Images do an adequate job of representing the item.