Seiko Cal. 7121 - 304

The 7121-304 is a sought-after Spring Drive piece from Seiko's golden era. The Coin-Edge bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-d8f63210f1a9]

Also known as: Silverwave

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

15.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1985

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