Seiko Cal. 6647 - 643

This Spring Drive model from 1974 features a 43mm PVD Black case. It features a White dial protected by a Mineral crystal and offers 110m of water resistance. [seikata-wm-d8fda38f08d6]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

8.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

110m

Dial Color

White

Jewels

21j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1974

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