Seiko Cal. 6311 - 990

The Seiko 6311-990 represents an important milestone in Seiko's 1976 lineup. It features a Green dial protected by a Mineral crystal and offers 60m of water resistance. [seikata-wm-c9f93ab553fd]

Also known as: Sea Horse

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

10.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

60m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1976

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