Seiko Cal. 4420 - 816

The Seiko 4420-816 represents an important milestone in Seiko's 1981 lineup. It features a Black dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-55cacfa645ed]

Also known as: Samurai, Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

45mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Black

Jewels

21j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1981

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