Seiko Cal. 6687 - 614

This Spring Drive model from 1976 features a 40mm PVD Black case. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-9019eeb88372]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

12.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1976

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