Seiko Cal. 4447 - 724

The 4447-724 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4447 caliber with 27j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-b0889b00bc93]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

8.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Green

Jewels

27j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1990

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