Seiko Cal. 6690 - 690

The 6690-690 is a sought-after Solar piece from Seiko's golden era. It features a Green dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-b657a8d198a8]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

40mm

Case Thickness

12.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

40m

Dial Color

Green

Jewels

22j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1977

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