Seiko Cal. 6640 - 513

The 6640-513 is a sought-after Quartz piece from Seiko's golden era. It features a Navy dial protected by a Acrylic crystal and offers 100m of water resistance. [seikata-wm-4a9b8deda01a]

Also known as: Panda, World Timer

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

37mm

Case Thickness

15.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Navy

Jewels

26j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1999

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