Seiko Cal. 4427 - 730

The 4427-730 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4427 caliber with 20j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-0d3d75c05719]

Also known as: Shogun, Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

14.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Navy

Jewels

20j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1971

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