Seiko Cal. 3860 - 777

The Seiko 3860-777 represents an important milestone in Seiko's 1971 lineup. The Fixed bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-67914aa53246]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

37mm

Case Thickness

13.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

130m

Dial Color

Silver

Jewels

35j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1971

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