Seiko Cal. 5640 - 433

The Seiko 5640-433 represents an important milestone in Seiko's 1965 lineup. Powered by the 5640 caliber with 18j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-5463f55c082e]

Also known as: Shogun, Sportsmatic

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Black

Jewels

18j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1965

Related Models

• Seiko 4517-208
• Seiko 6324-194
• Seiko 6659-560
• Seiko 5672-261
• Seiko 3833-696
• Seiko 6318-235
• Seiko 6680-982
• Seiko 6222-950
• Seiko 6382-462
• Seiko 3848-218
• Seiko 7081-276
• Seiko 4448-137