H. & W. Perrin Co. Mainspring for Bulova 5AD, 5AH - Alloy

H. & W. Perrin Co LTD Mainspring for Bulova caliber 5AD, 5AH movements and likely others as well, alloy, new in envelope. See image for precise mainspring specifications. H. & W. Perrin is the largest supplier of horological materials in Canada. Images do an adequate job of representing the item.