Seiko Cal. 6637 - 707

The Seiko 6637-707 represents an important milestone in Seiko's 1975 lineup. It features a Cream dial protected by a Mineral crystal and offers 80m of water resistance. [seikata-wm-cc9397403078]

Also known as: Sumo, Bullhead

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

37mm

Case Thickness

13.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

80m

Dial Color

Cream

Jewels

29j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1975

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