Seiko Cal. 4428 - 927

Released in 1975, the Cal. 4428 with design code 927 was part of Seiko's domestic market collection. It features a Navy dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-814d9f801270]

Also known as: Rally, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

10.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Navy

Jewels

25j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1975

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