21 jewels
The Citizen 6651A is an 8¾-ligne automatic movement featuring a micro-rotor with four ball-bearings, Parashock shock protection, and 21 jewels. Introduced between 1966 and 1970, it was the thinnest automatic movement of its era. The design incorporates a Girocap escapement and an indirectly driven minute hand, which enabled the notably low profile. Production has since been discontinued.
TECHNICAL SPECIFICATIONS
Movement Type
Automatic
Jewel Count
21 jewels
Display Type
Analog
Winding
Automatic (Bidirectional)
FEATURES
Sweep Seconds
