33 jewels40h power reserve28,800 vph (4 Hz)
The 3850B is a manual mechanical movement manufactured by Hangzhou Watch Company in China. It measures 36mm in diameter and 6.3mm thick, operates at 28800 vph, contains 33 jewels, and delivers a power reserve of at least 40 hours. The movement features a dual tourbillon complication and displays seconds via a sweep hand. This represents one of the few serial production dual tourbillon movements from a Chinese manufacturer.
Last updated 22 Sep 2026Suggest a correction
TECHNICAL SPECIFICATIONS
Movement Type
Manual Winding
Jewel Count
33 jewels
Power Reserve
40h
Frequency
28,800 vph (4 Hz)
Diameter
36mm
Height
6.3mm
Display Type
Analog
COMPLICATIONS
Tourbillon
FEATURES
Sweep Seconds
QUICK FACTS
FOR WATCH DEALERS
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