Seiko Cal. 6641 - 284

This Hand-Winding model from 1983 features a 34mm PVD Black case. It features a Blue Sunburst dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-f616c2d20926]

Also known as: Sumo, Helmet

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1983

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