Seiko Cal. 4551 - 728

This Spring Drive model from 1969 features a 34mm PVD Black case. It features a Navy dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-21aaa2618e45]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

8.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

34j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1969

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