Seiko Cal. 5631 - 607

Released in 1982, the Cal. 5631 with design code 607 was part of Seiko's domestic market collection. With its 18mm lug width and 11.8mm profile, it sits comfortably on most wrists. [seikata-wm-3547de2ee26d]

Also known as: Bellmatic, Arnie

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

36mm

Case Thickness

11.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

32j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1982

Related Models

• Seiko 6240-513
• Seiko 6262-750
• Seiko 6261-532
• Seiko 4479-704
• Seiko 0720-818
• Seiko 6127-281
• Seiko 0719-785
• Seiko 4583-989
• Seiko 5226-747
• Seiko 0773-262
• Seiko 7081-180
• Seiko 4578-627