H. & W. Perrin Co. Mainspring for OMEGA caliber 620 & 630 movements - Alloy

H. & W. Perrin Co LTD Le Roseau Mainspring for OMEGA caliber 620 & 630 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. All Le Roseau mainsprings are very new and are being sold at or below cost. Images do an adequate job of representing the item.