Seiko Cal. 6640 - 878

This Automatic model from 1984 features a 35mm Titanium case. With its 20mm lug width and 11.1mm profile, it sits comfortably on most wrists. [seikata-wm-ba73ec6e3e3f]

Also known as: Samurai

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

35mm

Case Thickness

11.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1984

Related Models

• Seiko 6646-285
• Seiko 4469-850
• Seiko 3831-182
• Seiko 6122-793
• Seiko 6366-406
• Seiko 6241-289
• Seiko 6634-416
• Seiko 3816-962
• Seiko 3818-970
• Seiko 3878-608
• Seiko 7194-820
• Seiko 6182-422