Seiko Cal. 6643 - 449

Released in 1968, the Cal. 6643 with design code 449 was part of Seiko's domestic market collection. It features a Green dial protected by a Acrylic crystal and offers 130m of water resistance. [seikata-wm-e6a7e9299f14]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

35mm

Case Thickness

9.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

130m

Dial Color

Green

Jewels

31j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1968

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