Seiko Cal. 6640 - 485

The Seiko 6640-485 represents an important milestone in Seiko's 1985 lineup. It features a Green dial protected by a Acrylic crystal and offers 180m of water resistance. [seikata-wm-77abf9bffa88]

Also known as: Bullhead, Golden Tuna

Specifications

Movement

Solar

Case Material

Titanium

Case Width

42mm

Case Thickness

9.4mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1985

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