Seiko Cal. 7021 - 538

The Seiko 7021-538 represents an important milestone in Seiko's 1970 lineup. Powered by the 7021 caliber with 31j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-20f428889eac]

Also known as: Sumo, Bellmatic

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

11.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

White

Jewels

31j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1970

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