Seiko Cal. 5666 - 427

Seiko 5666-427

The 5666-427 is a sought-after Solar piece from Seiko's golden era. Powered by the 5666 caliber with 28j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-c8b0f1d176b3]

Also known as: Bullhead, Baby Tuna

Specifications

Movement
Solar
Case Material
Stainless Steel
Case Width
45mm
Case Thickness
9.0mm
Lug Width
22mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
40m
Dial Color
Navy
Jewels
28j
Frequency
21,600 bph
Power Reserve
52 hours
Year
1977

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