Seiko Cal. 4478 - 221

Seiko 4478-221

The 4478-221 is a sought-after Solar piece from Seiko's golden era. Powered by the 4478 caliber with 22j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-5bc12ea44dc6]

Also known as: Samurai, Baby Tuna

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
44mm
Case Thickness
12.1mm
Lug Width
18mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
150m
Dial Color
Navy
Jewels
22j
Frequency
21,600 bph
Power Reserve
50 hours
Year
1974

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