Seiko Cal. 4520 - 638

Seiko 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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seikata-wm-ab41042b2024