Seiko Cal. 6231 - 788

This Hand-Winding model from 1975 features a 34mm PVD Black case. Powered by the 6231 caliber with 26j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-98e60a7ab990]

Also known as: Helmet, UFO

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

8.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

150m

Dial Color

Cream

Jewels

26j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1975

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