NEW OLD STOCK MARCO MAINSPRING FOR ANGELUS 251 WATCH PART #3364 Description- New Old Stock. Marco mainspring for vintage Angelus 251 watch movements barrel.Buy multiple parts in one shopping cart and save on shipping and time.Specifications-Brand- AngelusType- Mainspring #3364Condition- Brand New Old Stock. IMPORTANT DISCLAIMER FOR WATCH PARTS-Before you buy a watch part, please make sure it is exactly the part you need. If you do not know what you need we are here to help you! Just message us through eBay.New Old Stock (NOS) - Items that are described as NOS (new old stock) may still have some aging to them due to the parts being so old. Items sold as NOS are checked for rust or defects so rest assured you will get a working part when we describe it as NOS. This term is usually used to describe parts for vintage and discontinued watch models, brands Etc.Used or spare parts- Items described as such will be sold as described and photographed. Items sold for parts or repair will fall under this same category.