Seiko Cal. 4576 - 421

The Seiko 4576-421 represents an important milestone in Seiko's 1967 lineup. It features a White dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-87f997b1621a]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

White

Jewels

21j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1967

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