Seiko Cal. 6637 - 737

Released in 1975, the Cal. 6637 with design code 737 was part of Seiko's domestic market collection. It features a Green dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-90f6d008ee56]

Also known as: Rally, Bellmatic

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

120m

Dial Color

Green

Jewels

25j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1975

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