Seiko Cal. 4421 - 487

The Seiko 4421-487 represents an important milestone in Seiko's 1978 lineup. The Bidirectional bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-e6d0bd4685eb]

Also known as: Navigator

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

45mm

Case Thickness

15.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Cream

Jewels

17j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1978

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