Seiko Cal. 6320 - 551

This Hand-Winding model from 1980 features a 44mm Hardlex-Coated Steel case. Powered by the 6320 caliber with 21j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-3c9b6e03951e]

Also known as: Sumo, Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

12.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Green

Jewels

21j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1980

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