Seiko Cal. 6637 - 510

The Seiko 6637-510 represents an important milestone in Seiko's 1979 lineup. It features a Champagne dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-f4192b02e26a]

Also known as: UFO, Emperor

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Champagne

Jewels

27j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1979

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