Seiko Cal. 4578 - 421

The 4578-421 is a sought-after Spring Drive piece from Seiko's golden era. It features a Champagne dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-9d3fa5344ff8]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

8.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Champagne

Jewels

32j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1968

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