Seiko Cal. 6640 - 412

The 6640-412 is a sought-after Kinetic piece from Seiko's golden era. It features a Burgundy dial protected by a Sapphire crystal and offers 30m of water resistance. [seikata-wm-c7cad83d98af]

Also known as: UFO, Bellmatic

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

36mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Burgundy

Jewels

19j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1998

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