Seiko Cal. 4428 - 419

Seiko 4428-419

The 4428-419 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4428 caliber with 36j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-cd52faf9baa9]

Also known as: Baby Tuna

Specifications

Movement
Kinetic
Case Material
Gold-Plated
Case Width
43mm
Case Thickness
8.9mm
Lug Width
18mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
50m
Dial Color
White
Jewels
36j
Frequency
28,800 bph
Power Reserve
44 hours
Year
1970

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