Seiko Cal. 4555 - 645

The Seiko 4555-645 represents an important milestone in Seiko's 1981 lineup. Powered by the 4555 caliber with 33j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-5e0a42dac70e]

Also known as: Sportsmatic, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

13.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1981

Related Models

• Seiko 0712-260
• Seiko 5215-741
• Seiko 4468-340
• Seiko 4419-933
• Seiko 4590-733
• Seiko 7181-250
• Seiko 5247-803
• Seiko 0760-798
• Seiko 5270-346
• Seiko 6337-998
• Seiko 3819-616
• Seiko 0711-762