Seiko Cal. 3877 - 637

This Automatic model from 1985 features a 37mm Two-Tone case. Powered by the 3877 caliber with 36j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-0bb3709375c6]

Also known as: World Timer

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

White

Jewels

36j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1985

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