Seiko Cal. 4538 - 221

The 4538-221 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4538 caliber with 36j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-425a1cf89fd8]

Also known as: Sumo

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

40mm

Case Thickness

13.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1991

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