Seiko Cal. 4428 - 553

The Seiko 4428-553 represents an important milestone in Seiko's 1969 lineup. It features a Black dial protected by a Sapphire crystal and offers 60m of water resistance. [seikata-wm-97e56c6e2500]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

15.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Black

Jewels

32j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1969

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