Seiko Cal. 6637 - 850

This Automatic model from 1996 features a 37mm PVD Black case. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-0c8cd2685c04]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Navy

Jewels

34j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1996

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