Seiko Instruments Inc. 4R35

The 4R35 is an automatic movement manufactured by Seiko Instruments Inc. Operating at 21,600 beats per hour, it delivers a power reserve of approximately 41 hours and features a date complication. The caliber measures 12 lignes and belongs to Seiko's in-house 4R family, representing the manufacturer's mid-range mechanical offerings. The movement remains in production and serves as a base for numerous Seiko mechanical watches.