Seiko Cal. 6657 - 898

This Solar model from 1965 features a 40mm Two-Tone case. It features a Green dial protected by a Sapphire crystal and offers 120m of water resistance. [seikata-wm-697ee585f31d]

Also known as: Helmet, Emperor

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

40mm

Case Thickness

14.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

Green

Jewels

24j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1965

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