Seiko Cal. 4428 - 899

The 4428-899 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4428 caliber with 27j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-7da6ab537ee9]

Also known as: Helmet, Arnie

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

9.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1971

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