Original Japanese SeikoTMI NH35 Automatic Movement Crown At 3,3.8 and 6 White and Black

The TMI NH35 automatic movement is a legendary workhorse, prized by watchmakers and modders for its rock-solid reliability and exceptional value. This Japanese-made caliber offers the modern convenience of both hacking (stop-second) and hand-winding functions, a significant upgrade over older designs. Beating at 21,600 vph, it delivers a smooth sweep and a dependable 41-hour power reserve. Whether for a custom build or a reliable repair, the NH35 is the professional's choice for durable, precision timekeeping.

TMI NH35 Movement Full Specifications

• Manufacturer: Time Module Inc. (TMI) / Seiko Instruments Inc. (SII)

• Caliber: NH35A

• Movement Type: Automatic mechanical, self-winding (bidirectional rotor)

• Functions: Hours, minutes, central sweep seconds, instant date display with quick-set correction

• Diameter: 27.40 mm (movement only); 29.36 mm (including dial holding spacer)

• Height / Thickness: 5.32 mm

• Size (Lignes): 12'''

• Frequency: 21,600 vibrations per hour (vph) / 3 Hertz (Hz)

• Jewels: 24

• Power Reserve: 41+ hours (at full wind)

• Accuracy Rating: -20 to +40 seconds per day (factory specification)

• Winding: Bidirectional automatic winding; Manual hand-winding capability

• Hacking (Stop-Seconds): Yes

• Date Display: Yes, quick-set feature; typical date position at 3 o'clock

• Hand Sizes: Hour - 1.50 mm / Minute - 0.88 mm / Second - 0.20 mm

• Lift Angle: 52 degrees

• Country of Origin: Japan or Malaysia