Seiko Cal. 5637 - 745

The Seiko 5637-745 represents an important milestone in Seiko's 1980 lineup. With its 20mm lug width and 10.4mm profile, it sits comfortably on most wrists. [seikata-wm-a7493d89f6dc]

Also known as: Golden Tuna, Baby Tuna

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

10.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1980

Related Models

• Seiko 6377-596
• Seiko 3873-161
• Seiko 6164-509
• Seiko 7054-471
• Seiko 4467-534
• Seiko 7065-671
• Seiko 7085-752
• Seiko 4599-857
• Seiko 7016-571
• Seiko 5251-798
• Seiko 5638-509
• Seiko 0721-423