Seiko Cal. 4521 - 634

Seiko 4521-634

The 4521-634 is a sought-after Solar piece from Seiko's golden era. Powered by the 4521 caliber with 33j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-b6487b22cf19]

Also known as: Turtle, Helmet

Specifications

Movement
Solar
Case Material
Stainless Steel
Case Width
40mm
Case Thickness
9.1mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
110m
Dial Color
Champagne
Jewels
33j
Frequency
21,600 bph
Power Reserve
60 hours
Year
1979

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