Seiko Cal. 4421 - 638

Released in 1965, the Cal. 4421 with design code 638 was part of Seiko's domestic market collection. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-ebc1962ce040]

Also known as: Monster, Navigator

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

37mm

Case Thickness

14.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Cream

Jewels

32j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1965

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