Seiko Cal. 6673 - 728

The Seiko 6673-728 represents an important milestone in Seiko's 1967 lineup. It features a Silver dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-ed524a045105]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

8.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Silver

Jewels

26j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1967

Related Models

• Seiko 6150-300
• Seiko 4478-218
• Seiko 7083-924
• Seiko 7096-359
• Seiko 5219-780
• Seiko 6355-976
• Seiko 7010-989
• Seiko 6272-173
• Seiko 7185-339
• Seiko 4511-427
• Seiko 4574-649
• Seiko 5664-763