Seiko Cal. 4447 - 757

The 4447-757 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4447 caliber with 32j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-57dd918be171]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Burgundy

Jewels

32j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1993

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