Seiko Cal. 6644 - 428

The Seiko 6644-428 represents an important milestone in Seiko's 1972 lineup. The Fixed bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-c64c44aa69d2]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

8.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1972

Related Models

• Seiko 0741-494
• Seiko 7155-270
• Seiko 6218-274
• Seiko 7166-996
• Seiko 5247-990
• Seiko 6627-635
• Seiko 4444-924
• Seiko 6339-451
• Seiko 4541-684
• Seiko 6231-450
• Seiko 6615-105
• Seiko 7135-575