Seiko Cal. 6637 - 926

The Seiko 6637-926 represents an important milestone in Seiko's 1976 lineup. It features a Green dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-fe8adc36877b]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

39mm

Case Thickness

9.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Green

Jewels

23j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1976

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