Seiko Cal. 6311 - 787

The Seiko 6311-787 represents an important milestone in Seiko's 1981 lineup. Powered by the 6311 caliber with 20j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-57380a765c46]

Also known as: Tuna

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Black

Jewels

20j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1981

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