Seiko Cal. 6238 - 720

This Spring Drive model from 1966 features a 37mm Stainless Steel case. Powered by the 6238 caliber with 22j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-19207cae68db]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

12.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

22j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1966

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