Seiko Cal. 4578 - 721

The 4578-721 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4578 caliber with 19j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-c00cbcdd1800]

Also known as: Turtle, Shogun

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

15.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Black

Jewels

19j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1980

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