Seiko Cal. 5648 - 831

The Seiko 5648-831 represents an important milestone in Seiko's 1985 lineup. With its 19mm lug width and 12.7mm profile, it sits comfortably on most wrists. [seikata-wm-98be4a4d3e34]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

12.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Black

Jewels

24j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1985

Related Models

• Seiko 7178-932
• Seiko 6666-818
• Seiko 6690-136
• Seiko 5278-771
• Seiko 6265-910
• Seiko 0781-702
• Seiko 4477-759
• Seiko 7114-561
• Seiko 4590-212
• Seiko 6293-188
• Seiko 0710-756
• Seiko 5282-986