Seiko Cal. 6642 - 105

The Seiko 6642-105 represents an important milestone in Seiko's 1976 lineup. The Bidirectional bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-f087502bbe66]

Also known as: Sportsmatic, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1976

Related Models

• Seiko 4423-674
• Seiko 6264-592
• Seiko 7114-668
• Seiko 3863-283
• Seiko 7164-846
• Seiko 5679-226
• Seiko 7155-418
• Seiko 7098-301
• Seiko 6184-622
• Seiko 6659-204
• Seiko 5262-663
• Seiko 5270-202