Seiko Cal. 6143 - 698

This Spring Drive model from 1971 features a 38mm PVD Black case. It features a Silver dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-9c644854e019]

Also known as: Tuna, Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

8.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Silver

Jewels

31j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1971

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