Seiko Cal. 4428 - 646

The Seiko 4428-646 represents an important milestone in Seiko's 1970 lineup. It features a Black dial protected by a Acrylic crystal and offers 50m of water resistance. [seikata-wm-10cc262a3cb2]

Also known as: Samurai, Silverwave

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

9.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Black

Jewels

32j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1970

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