Seiko Cal. 6684 - 842

The Seiko 6684-842 represents an important milestone in Seiko's 1977 lineup. Powered by the 6684 caliber with 24j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-6270a73e3c0c]

Also known as: Sumo, Silverwave

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

13.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

70m

Dial Color

Champagne

Jewels

24j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1977

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