Seiko Cal. 6637 - 393

The 6637-393 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6637 caliber with 30j jewels beating at 21,600 bph, it delivers a 47 hours power reserve. [seikata-wm-0eed412c3289]

Also known as: Pogue, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

8.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

60m

Dial Color

Green

Jewels

30j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1990

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