Seiko Cal. 4520 - 638

The 4520-638 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4520 caliber with 27j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-ab41042b2024]

Also known as: Crown, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Burgundy

Jewels

27j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1991

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