Seiko Cal. 5640 - 901

The Seiko 5640-901 represents an important milestone in Seiko's 1967 lineup. Powered by the 5640 caliber with 20j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-67aa00ab4fa0]

Also known as: Panda

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

39mm

Case Thickness

9.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Green

Jewels

20j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1967

Related Models

• Seiko 7131-727
• Seiko 4551-673
• Seiko 4573-477
• Seiko 7124-720
• Seiko 3897-141
• Seiko 4426-561
• Seiko 7187-840
• Seiko 4567-837
• Seiko 6115-326
• Seiko 6298-341
• Seiko 6396-229
• Seiko 6657-763