Seiko Cal. 6238 - 641

This Automatic model from 1970 features a 40mm PVD Black case. Powered by the 6238 caliber with 33j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-3f262e33cdb8]

Also known as: Sumo, Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Cream

Jewels

33j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1970

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