Seiko Cal. 6311 - 426

The 6311-426 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6311 caliber with 28j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-d17d7537c3c3]

Also known as: Sumo, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

130m

Dial Color

Navy

Jewels

28j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1969

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