Seiko Cal. 6391 - 487

The Seiko 6391-487 represents an important milestone in Seiko's 1993 lineup. Powered by the 6391 caliber with 30j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-647708753680]

Also known as: Tuna, Rally

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

38mm

Case Thickness

10.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

Black

Jewels

30j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1993

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