Seiko Cal. 6640 - 333

The Seiko 6640-333 represents an important milestone in Seiko's 1997 lineup. It features a Burgundy dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-1ec39979bcc2]

Also known as: Bullhead

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

15.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

100m

Dial Color

Burgundy

Jewels

19j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1997

Related Models

• Seiko 0757-386
• Seiko 4568-326
• Seiko 6353-598
• Seiko 7122-802
• Seiko 6214-857
• Seiko 0726-834
• Seiko 0716-584
• Seiko 5275-971
• Seiko 6697-517
• Seiko 6294-912
• Seiko 4563-474
• Seiko 6228-963