Seiko Cal. 6635 - 625

The Seiko 6635-625 represents an important milestone in Seiko's 1975 lineup. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-9c81f9e9c8e9]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

12.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1975

Related Models

• Seiko 3874-408
• Seiko 3869-412
• Seiko 3837-863
• Seiko 5242-660
• Seiko 4586-488
• Seiko 6226-144
• Seiko 0791-821
• Seiko 6221-828
• Seiko 4482-162
• Seiko 6657-870
• Seiko 7190-552
• Seiko 7082-908