Seiko Cal. 3864 - 638

The Seiko 3864-638 represents an important milestone in Seiko's 1969 lineup. Powered by the 3864 caliber with 35j jewels beating at 28,800 bph, it delivers a 67 hours power reserve. [seikata-wm-6aab26ae8ae3]

Also known as: Pogue, Baby Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

39mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Green

Jewels

35j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1969

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