Seiko Cal. 4556 - 991

The Seiko 4556-991 represents an important milestone in Seiko's 1982 lineup. Powered by the 4556 caliber with 24j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-ac099df8df0b]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

34mm

Case Thickness

15.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Green

Jewels

24j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1982

Related Models

• Seiko 6175-250
• Seiko 7188-194
• Seiko 0769-729
• Seiko 6235-653
• Seiko 5613-676
• Seiko 3824-923
• Seiko 6333-393
• Seiko 5655-799
• Seiko 6217-512
• Seiko 0718-558
• Seiko 6186-569
• Seiko 6243-704