Seiko Cal. 5637 - 665

The 5637-665 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5637 caliber with 26j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-6c2bae68bf12]

Also known as: Rally, Arnie

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

12.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

120m

Dial Color

White

Jewels

26j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1981

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