Seiko Cal. 6645 - 891

The Seiko 6645-891 represents an important milestone in Seiko's 1988 lineup. It features a Green dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-91161420ea97]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

34mm

Case Thickness

11.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

150m

Dial Color

Green

Jewels

30j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1988

Related Models

• Seiko 3872-152
• Seiko 4441-866
• Seiko 3863-332
• Seiko 6669-638
• Seiko 6345-343
• Seiko 5213-874
• Seiko 0753-133
• Seiko 5246-819
• Seiko 5241-438
• Seiko 4524-139
• Seiko 3849-749
• Seiko 5616-970