Seiko Cal. 6397 - 477

The 6397-477 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6397 caliber with 30j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-690ef3c41934]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

11.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Burgundy

Jewels

30j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1980

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