Seiko Cal. 6685 - 428

The Seiko 6685-428 represents an important milestone in Seiko's 1980 lineup. Powered by the 6685 caliber with 18j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-44f77f5b1289]

Also known as: Sumo, Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Green

Jewels

18j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1980

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