Seiko Cal. 6637 - 239

The 6637-239 is a sought-after Spring Drive piece from Seiko's golden era. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-770cb124cbe9]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

11.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

White

Jewels

29j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1996

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