Seiko Cal. 5621 - 283

The Seiko 5621-283 represents an important milestone in Seiko's 1978 lineup. Powered by the 5621 caliber with 30j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-2c4ed5ac8fec]

Also known as: Sumo, Arnie

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

8.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Champagne

Jewels

30j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1978

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