Seiko Cal. 6646 - 856

This Spring Drive model from 1971 features a 43mm PVD Black case. It features a Blue Sunburst dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-ed8fa76f29c7]

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

15.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1971

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