Seiko Cal. 6637 - 633

The 6637-633 is a sought-after Spring Drive piece from Seiko's golden era. With its 20mm lug width and 9.6mm profile, it sits comfortably on most wrists. [seikata-wm-e6253007c84f]

Also known as: Crown

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

9.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

Green

Jewels

26j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1994

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