Seiko Cal. 4428 - 750

Seiko 4428-750

The 4428-750 is a sought-after Spring Drive piece from Seiko's golden era. It features a Cream dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-b34c0cafa550]

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
15.9mm
Lug Width
18mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
40m
Dial Color
Cream
Jewels
20j
Frequency
21,600 bph
Power Reserve
70 hours
Year
1972

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seikata-wm-b34c0cafa550