Watch-Craft Mainspring 3822W – 1.80 x 0.10 x 11½" – Dennison 9 / 11
Watch-Craft Mainspring 3822W – 1.80 x 0.10 x 11½" – Dennison 9 / 11 – USA NOS. & E. Marshall Co., USA. A robust, precision-made mainspring constructed from white alloy fornon-magnetic ,unbreakable, andrustproof performance.