Seiko Cal. 6640 - 391

This Solar model from 1982 features a 38mm PVD Black case. Powered by the 6640 caliber with 29j jewels beating at 21,600 bph, it delivers a 41 hours power reserve. [seikata-wm-fa21e3de2ff3]

Also known as: Shogun

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

38mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

White

Jewels

29j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1982

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