Seiko Cal. 6637 - 623

The Seiko 6637-623 represents an important milestone in Seiko's 1966 lineup. It features a Black dial protected by a Acrylic crystal and offers 140m of water resistance. [seikata-wm-089db664e21c]

Also known as: Emperor

Specifications

Movement

Solar

Case Material

Titanium

Case Width

35mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

140m

Dial Color

Black

Jewels

35j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1966

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