Seiko Cal. 5617 - 637

This Hand-Winding model from 1965 features a 42mm Two-Tone case. With its 18mm lug width and 11.8mm profile, it sits comfortably on most wrists. [seikata-wm-59ad7fc0e0d4]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

42mm

Case Thickness

11.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Champagne

Jewels

35j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1965

Related Models

• Seiko 6236-968
• Seiko 7146-657
• Seiko 4589-359
• Seiko 4441-901
• Seiko 4544-783
• Seiko 4442-881
• Seiko 6656-739
• Seiko 6385-256
• Seiko 0721-215
• Seiko 7017-921
• Seiko 4417-750
• Seiko 5676-311