Seiko Cal. 6637 - 160

This Spring Drive model from 1989 features a 45mm Hardlex-Coated Steel case. It features a Burgundy dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-bbf623321f57]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

14.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Burgundy

Jewels

25j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1989

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