Seiko Cal. 4491 - 964

The 4491-964 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4491 caliber with 27j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-b1b945df85b7]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

15.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Green

Jewels

27j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1988

Related Models

• Seiko 0781-783
• Seiko 5246-526
• Seiko 6126-997
• Seiko 5623-705
• Seiko 7148-879
• Seiko 6689-921
• Seiko 6350-496
• Seiko 5256-925
• Seiko 6191-852
• Seiko 5659-885
• Seiko 7022-120
• Seiko 5260-250