Seiko Cal. 4447 - 401

The 4447-401 is a sought-after Spring Drive piece from Seiko's golden era. It features a Green dial protected by a Sapphire crystal and offers 70m of water resistance. [seikata-wm-a2f5e24cc7a5]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

9.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Green

Jewels

31j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1976

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