求劳泡泡背封闭机芯的小零件

This is a double spring/friction spring (parts#4053).





It's been hard to find a vintage genuine parts...
for generic parts, you can check link below...

http://www.jewelerssupplies.com/product6824.html





*pic & link borrowed

eBay has generic...


http://www.ebay.com/itm/310796067447

香山泉 发表于 2016-10-19 23:30
经您的指导，我在ebay买了两个，留一个备用。谢谢

兄台，不用客气！
之前我也买了给老师傅安装，一切操作正常。
另香港表友们称这件double spring为 "风火轮" 非常贴切！