Seiko Cal. 6311 - 400

This Quartz model from 1980 features a 40mm PVD Black case. Powered by the 6311 caliber with 31j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-e27d1f0d4ea9]

Also known as: Sumo, Flighty

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

40mm

Case Thickness

12.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

31j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1980

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