Seiko Cal. 6640 - 720

This Solar model from 1985 features a 34mm PVD Black case. It features a White dial protected by a Hardlex crystal and offers 190m of water resistance. [seikata-wm-6e4e2cf704be]

Also known as: World Timer

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

34mm

Case Thickness

13.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

190m

Dial Color

White

Jewels

36j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1985

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