Seiko Cal. 6391 - 422

The 6391-422 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6391 caliber with 36j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-7ca075f58300]

Also known as: Tuna, Silverwave

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

15.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

60m

Dial Color

Burgundy

Jewels

36j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1976

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