Seiko Cal. 7021 - 503

The 7021-503 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7021 caliber with 35j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-a44caa8986d3]

Also known as: Sportsmatic, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

8.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

50m

Dial Color

Burgundy

Jewels

35j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1997

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