Seiko Cal. 3872 - 641

The Seiko 3872-641 represents an important milestone in Seiko's 1979 lineup. Powered by the 3872 caliber with 29j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-a39a49e0f7ca]

Also known as: Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

43mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Champagne

Jewels

29j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1979

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