Seiko Cal. 5640 - 556

The Seiko 5640-556 represents an important milestone in Seiko's 1999 lineup. Powered by the 5640 caliber with 24j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-1fc2482138c6]

Also known as: Samurai, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

11.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

60m

Dial Color

Navy

Jewels

24j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1999

Related Models

• Seiko 4566-327
• Seiko 6249-248
• Seiko 0726-836
• Seiko 5237-406
• Seiko 7089-478
• Seiko 6639-159
• Seiko 6330-404
• Seiko 6673-128
• Seiko 3830-862
• Seiko 5275-913
• Seiko 6362-654
• Seiko 7038-907