Seiko Cal. 4421 - 736

The Seiko 4421-736 represents an important milestone in Seiko's 1971 lineup. It features a Black dial protected by a Sapphire crystal and offers 60m of water resistance. [seikata-wm-e38e8a52f007]

Also known as: World Timer, Sea Horse

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

43mm

Case Thickness

15.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Black

Jewels

31j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1971

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