Seiko Cal. 3864 - 637

The Seiko 3864-637 represents an important milestone in Seiko's 1970 lineup. It features a Green dial protected by a Acrylic crystal and offers 100m of water resistance. [seikata-wm-288fe3aae1cb]

Also known as: Bullhead

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

9.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Green

Jewels

23j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1970

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