Seiko Cal. 4521 - 537

The 4521-537 is a sought-after Hand-Winding piece from Seiko's golden era. With its 19mm lug width and 10.0mm profile, it sits comfortably on most wrists. [seikata-wm-c748da6bfc45]

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

10.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Green

Jewels

18j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1978

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