Seiko Cal. 5640 - 503

The 5640-503 is a sought-after Kinetic piece from Seiko's golden era. It features a Navy dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-685f08c91f35]

Also known as: Monster

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

8.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Navy

Jewels

30j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1967

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