Seiko Cal. 0721 - 357

The 0721-357 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 0721 caliber with 35j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-c7a86fbe045f]

Also known as: Silverwave

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

12.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Green

Jewels

35j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1983

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