Seiko Cal. 6635 - 137

The Seiko 6635-137 represents an important milestone in Seiko's 1983 lineup. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-5f83700abc4a]

Also known as: Panda, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

42mm

Case Thickness

14.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1983

Related Models

• Seiko 4586-879
• Seiko 6378-906
• Seiko 7045-712
• Seiko 4428-892
• Seiko 5636-358
• Seiko 4480-150
• Seiko 6237-841
• Seiko 7189-314
• Seiko 7126-280
• Seiko 5263-749
• Seiko 5643-375
• Seiko 4536-473