Seiko Cal. 6391 - 650

The 6391-650 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6391 caliber with 22j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-99a4fa0dfe73]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

8.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

110m

Dial Color

Silver

Jewels

22j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1987

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