Seiko Cal. 6658 - 826

This Spring Drive model from 1977 features a 44mm PVD Black case. The Coin-Edge bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-14a63dc7d6c0]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

13.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Navy

Jewels

21j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1977

Related Models

• Seiko 6399-416
• Seiko 5260-649
• Seiko 7094-193
• Seiko 7017-907
• Seiko 4438-785
• Seiko 3848-348
• Seiko 4572-586
• Seiko 0715-434
• Seiko 7065-518
• Seiko 6649-532
• Seiko 7116-669
• Seiko 5238-286