Seiko Cal. 6687 - 978

The Seiko 6687-978 represents an important milestone in Seiko's 1966 lineup. It features a Silver dial protected by a Acrylic crystal and offers 30m of water resistance. [seikata-wm-150d6a96331f]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

12.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Silver

Jewels

32j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1966

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