Seiko Cal. 5623 - 640

The Seiko 5623-640 represents an important milestone in Seiko's 1999 lineup. The Inner Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-81af2949a79d]

Also known as: Bullhead, Emperor

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

10.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

White

Jewels

30j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1999

Related Models

• Seiko 5650-290
• Seiko 7024-846
• Seiko 3835-814
• Seiko 6386-539
• Seiko 4591-836
• Seiko 0783-354
• Seiko 6650-989
• Seiko 5253-453
• Seiko 4540-500
• Seiko 7148-365
• Seiko 6156-514
• Seiko 6289-439