Seiko Cal. 6681 - 440

The Seiko 6681-440 represents an important milestone in Seiko's 1980 lineup. Powered by the 6681 caliber with 29j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-5363cb86942d]

Also known as: Helmet, Crown

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Navy

Jewels

29j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1980

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