Seiko Cal. 6688 - 312

This Quartz model from 1971 features a 37mm PVD Black case. Powered by the 6688 caliber with 36j jewels beating at 21,600 bph, it delivers a 47 hours power reserve. [seikata-wm-05e5ea40dcb1]

Also known as: Crown

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

White

Jewels

36j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1971

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