Seiko Cal. 6610 - 644

The Seiko 6610-644 represents an important milestone in Seiko's 1974 lineup. Powered by the 6610 caliber with 17j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-280308e86771]

Also known as: Monster, Navigator

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1974

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