Seiko Cal. 4445 - 557

The 4445-557 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4445 caliber with 28j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-22cc121338df]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

42mm

Case Thickness

12.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Champagne

Jewels

28j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1989

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