Family: nh23 jewels41h power reserve21,600 vph (6 Hz)
The SII-NH05A is an automatic movement manufactured by Seiko in Japan. It operates at 21,600 vph with a 41-hour power reserve and features hand-winding, hacking, and a date complication. The 17.5mm diameter makes it suitable for smaller case sizes. Notable applications include the E.C. Andersson North Sea II and CIGA Design Series U Black Hole.
TECHNICAL SPECIFICATIONS
Movement Type
Automatic
Jewel Count
23 jewels
Power Reserve
41h
Frequency
21,600 vph (6 Hz)
Diameter
17.5mm
Display Type
Analog
Winding
Automatic (Unidirectional)
Shock Protection
Seiko Shield
COMPLICATIONS
Date
FEATURES
Hand Winding
