Seiko Cal. 6397 - 253

This Spring Drive model from 1969 features a 34mm PVD Black case. Powered by the 6397 caliber with 26j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-842ff7741848]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

14.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Silver

Jewels

26j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1969

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