Seiko Cal. 5678 - 684

This Quartz model from 1970 features a 35mm Hardlex-Coated Steel case. It features a Green dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-d4e5e4d67e7c]

Also known as: Bullhead, Helmet

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Green

Jewels

27j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1970

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