Seiko Cal. 6688 - 551

The Seiko 6688-551 represents an important milestone in Seiko's 1977 lineup. Powered by the 6688 caliber with 31j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-15c99271b23f]

Also known as: Sumo, Shogun

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

42mm

Case Thickness

14.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1977

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