Seiko Cal. 0738 - 637

The 0738-637 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 0738 caliber with 25j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-736b967357b0]

Also known as: Tuna, Flighty

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

15.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Cream

Jewels

25j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1981

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