H. & W. Perrin Co. Mainspring for UNITAS caliber 6498 P.W. Movements - Alloy

H. & W. Perrin Co LTD Le Roseau Mainspring for UNITAS caliber 6498 pocket watch 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.