Seiko Cal. 7121 - 578

The 7121-578 is a sought-after Automatic piece from Seiko's golden era. Powered by the 7121 caliber with 20j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-99e5a1def731]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

38mm

Case Thickness

10.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Cream

Jewels

20j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1966

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