SAMSON Mainspring No. 7049 for AS 1053, Blancpain 40 - Steel

SAMSON Mainspring No. 7049 for AS caliber 1053, Blancpain caliber 40 movements and perhaps even more, steel, new in envelope. See images for precise mainspring specifications. I likely have several of these so the one you get may differ slightly from the images. Images do an adequate job of representing the item.