Seiko Cal. 6643 - 420

The Seiko 6643-420 represents an important milestone in Seiko's 1996 lineup. It features a Silver dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-aa7bafc8c67a]

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

14.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Silver

Jewels

19j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1996

Related Models

• Seiko 6629-276
• Seiko 0742-440
• Seiko 4494-415
• Seiko 6191-531
• Seiko 5657-428
• Seiko 5629-589
• Seiko 3845-687
• Seiko 0793-799
• Seiko 4555-391
• Seiko 5224-266
• Seiko 6222-390
• Seiko 5287-566