Seiko Cal. 6331 - 689

The Seiko 6331-689 represents an important milestone in Seiko's 1969 lineup. Powered by the 6331 caliber with 17j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-202599456a32]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

15.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

50m

Dial Color

Silver

Jewels

17j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1969

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