Seiko Cal. 6660 - 789

The Seiko 6660-789 represents an important milestone in Seiko's 1998 lineup. It features a Black dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-682a0b7ea17f]

Also known as: Helmet, Flighty

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

9.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Black

Jewels

31j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1998

Related Models

• Seiko 6651-805
• Seiko 6220-694
• Seiko 6615-214
• Seiko 4465-929
• Seiko 6680-699
• Seiko 7194-903
• Seiko 6313-342
• Seiko 4557-499
• Seiko 3837-969
• Seiko 0750-223
• Seiko 7060-730
• Seiko 0761-849