Seiko Cal. 6397 - 856

The 6397-856 is a sought-after Spring Drive piece from Seiko's golden era. It features a Burgundy dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-081e19bfb892]

Also known as: Monster, Sumo

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Burgundy

Jewels

30j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1977

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