Seiko Cal. 4448 - 538

The 4448-538 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4448 caliber with 20j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-fbd25e49dac8]

Also known as: Sumo, Sea Horse

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1980

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