Seiko Cal. 4540 - 121

The 4540-121 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4540 caliber with 28j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-616ab3a9d001]

Also known as: Sumo

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

34mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1978

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