Seiko Cal. 6685 - 964

This Spring Drive model from 1971 features a 40mm Stainless Steel case. It features a Black dial protected by a Sapphire crystal and offers 80m of water resistance. [seikata-wm-63c3044bc9b5]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

9.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Black

Jewels

31j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1971

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