Seiko Cal. 6637 - 175

This Automatic model from 1985 features a 36mm Two-Tone case. With its 22mm lug width and 10.2mm profile, it sits comfortably on most wrists. [seikata-wm-ae35bdf13acf]

Also known as: Monster, Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

36mm

Case Thickness

10.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Black

Jewels

24j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1985

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