Seiko Cal. 4428 - 346

Seiko 4428-346

The 4428-346 is a sought-after Spring Drive piece from Seiko's golden era. The Coin-Edge bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-fe811f675fab]

Also known as: Bellmatic

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
34mm
Case Thickness
14.5mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
30m
Dial Color
Blue Sunburst
Jewels
28j
Frequency
28,800 bph
Power Reserve
44 hours
Year
1971

Related Models

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