Seiko Cal. 5640 - 147

This Spring Drive model from 1972 features a 45mm Hardlex-Coated Steel case. It features a White dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-07debd7c0261]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

9.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

White

Jewels

28j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1972

Related Models

• Seiko 0769-376
• Seiko 5665-922
• Seiko 6349-842
• Seiko 4521-911
• Seiko 4431-952
• Seiko 5269-985
• Seiko 5660-519
• Seiko 3836-468
• Seiko 7143-771
• Seiko 6270-335
• Seiko 6173-285
• Seiko 4563-389