H. & W. Perrin Co. Mainspring for FONT caliber 75 Movements - Alloy

H. & W. Perrin Co LTD Le Roseau Mainspring for FONT caliber 75 movements and perhaps 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.