Seiko Cal. 6643 - 902

The 6643-902 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6643 caliber with 36j jewels beating at 21,600 bph, it delivers a 72 hours power reserve. [seikata-wm-bd66edbb9d61]

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

34mm

Case Thickness

9.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Green

Jewels

36j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1987

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