Naoya Hida & Co. Cal. 3019SS

Cal. 3019SS is a manual-winding movement manufactured by Naoya Hida & Co. It measures 30mm (13¼ lignes) in diameter and 4.3mm thick, beats at 28,800 vph with a 48-hour power reserve, and contains 18 jewels. The caliber features a newly designed main and balance bridge with a Grucydale balance and flat hairspring. Part of the 3000 Series, it is an in-house movement that was used in the NH Type 1B, limited to 7 pieces.