Seiko Cal. 6644 - 318

The 6644-318 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6644 caliber with 29j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-6be0cc799287]

Also known as: Monster, Navigator

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

38mm

Case Thickness

14.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

80m

Dial Color

Green

Jewels

29j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1979

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