Seiko Cal. 6657 - 683

This Quartz model from 1981 features a 41mm Gold-Plated case. Powered by the 6657 caliber with 23j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-0316124a7d7f]

Also known as: Helmet, Bellmatic

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1981

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