Seiko Cal. 6685 - 640

This Spring Drive model from 1980 features a 44mm Stainless Steel case. Powered by the 6685 caliber with 18j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-0c90bacbe77e]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

13.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1980

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