Seiko Cal. 6643 - 991

Seiko 6643-991

This Automatic model from 1987 features a 43mm PVD Black case. Powered by the 6643 caliber with 24j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-40c1ce11b1bf]

Also known as: Turtle, Flighty

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
43mm
Case Thickness
9.8mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
130m
Dial Color
Green
Jewels
24j
Frequency
28,800 bph
Power Reserve
51 hours
Year
1987

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