Seiko Cal. 4445 - 438

The 4445-438 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4445 caliber with 26j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-f490edfdd562]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

42mm

Case Thickness

11.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

180m

Dial Color

White

Jewels

26j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1987

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