Seiko Cal. 6640 - 349

Released in 1987, the Cal. 6640 with design code 349 was part of Seiko's domestic market collection. It features a Green dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-70e18c8f108b]

Also known as: Shogun, UFO

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

43mm

Case Thickness

12.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1987

Related Models

• Seiko 4474-188
• Seiko 5692-912
• Seiko 5645-453
• Seiko 6268-800
• Seiko 6396-165
• Seiko 0779-471
• Seiko 6180-457
• Seiko 4468-607
• Seiko 6631-311
• Seiko 4595-379
• Seiko 4559-924
• Seiko 4486-947