Seiko Cal. 6687 - 556

The Seiko 6687-556 represents an important milestone in Seiko's 1967 lineup. It features a Champagne dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-6121c72f3893]

Also known as: Sumo, Navigator

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

12.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Champagne

Jewels

28j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1967

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