Seiko Cal. 5641 - 666

The 5641-666 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5641 caliber with 31j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-aac0916e07be]

Also known as: Shogun, Baby Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

45mm

Case Thickness

9.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

70m

Dial Color

Champagne

Jewels

31j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1970

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