Seiko Cal. 4420 - 988

The Seiko 4420-988 represents an important milestone in Seiko's 1971 lineup. It features a Black dial protected by a Acrylic crystal and offers 170m of water resistance. [seikata-wm-662629fc29ae]

Also known as: Navigator

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

12.3mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

170m

Dial Color

Black

Jewels

33j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1971

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