Seiko Cal. 6628 - 540

This Spring Drive model from 1988 features a 43mm Titanium case. It features a Silver dial protected by a Acrylic crystal and offers 70m of water resistance. [seikata-wm-60ec3856fc36]

Also known as: Tuna, Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1988

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