Seiko Cal. 6391 - 713

The 6391-713 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6391 caliber with 20j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-d50a790e44f4]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1996

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