Seiko Cal. 5640 - 600

The 5640-600 is a sought-after Automatic piece from Seiko's golden era. It features a Burgundy dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-3abb4cc19969]

Also known as: Tuna, UFO

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

12.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Burgundy

Jewels

20j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1970

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