Seiko Cal. 5621 - 427

The Seiko 5621-427 represents an important milestone in Seiko's 1975 lineup. Powered by the 5621 caliber with 20j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-1a74310deb37]

Also known as: Monster

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

35mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Burgundy

Jewels

20j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1975

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