Seiko Cal. 5640 - 712

This Automatic model from 1973 features a 44mm PVD Black case. Powered by the 5640 caliber with 24j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-05cfbda6cdcf]

Also known as: Pogue, World Timer

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

44mm

Case Thickness

15.7mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Silver

Jewels

24j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1973

Related Models

• Seiko 3857-878
• Seiko 3813-634
• Seiko 7099-283
• Seiko 6275-171
• Seiko 5664-323
• Seiko 4597-681
• Seiko 6630-291
• Seiko 6317-980
• Seiko 4568-994
• Seiko 4526-281
• Seiko 7017-961
• Seiko 0781-341