Seiko Cal. 5613 - 521

The 5613-521 is a sought-after Spring Drive piece from Seiko's golden era. The Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-0cde2a1d6fc3]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

150m

Dial Color

Cream

Jewels

22j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1971

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