Seiko Cal. 3864 - 512

The Seiko 3864-512 represents an important milestone in Seiko's 1981 lineup. It features a Green dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-b580b1689b17]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

44mm

Case Thickness

9.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Green

Jewels

34j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1981

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