Seiko Cal. 6391 - 291

The Seiko 6391-291 represents an important milestone in Seiko's 1998 lineup. Powered by the 6391 caliber with 35j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-a43483f8fb86]

Also known as: Tuna, Helmet

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

12.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

180m

Dial Color

Black

Jewels

35j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1998

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