P-338 MAIN SPRING, 1″ wide, 3/4c, “7” Inner, PearOuter, NOS

P-338 SPRING: 1″ x .034 x 10 ft. ¾” bent arbor, Inner end in shape of “7”, Pear hole outer end. This is a never used old stock (NOS) with original wire coil. It is a special spring with the inner end shaped like a “7” and for that this is a rare spring.  Please note: Springs are NOT returnable. Extreme caution must be used when working with mainsprings! Not responsible for damages or accidents!  USA shipment only.