Seiko Cal. 6646 - 424

The Seiko 6646-424 represents an important milestone in Seiko's 1972 lineup. Powered by the 6646 caliber with 36j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-23748ea77f31]

Also known as: Shogun, Helmet

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

42mm

Case Thickness

15.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Green

Jewels

36j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1972

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