Seiko Cal. 4523 - 631

The Seiko 4523-631 represents an important milestone in Seiko's 1971 lineup. With its 18mm lug width and 12.1mm profile, it sits comfortably on most wrists. [seikata-wm-0c3fa273b530]

Also known as: UFO, Crown

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

12.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1971

Related Models

• Seiko 4583-538
• Seiko 4486-246
• Seiko 6678-749
• Seiko 7192-478
• Seiko 6678-535
• Seiko 7147-583
• Seiko 7066-628
• Seiko 6614-432
• Seiko 5257-872
• Seiko 4452-378
• Seiko 7134-855
• Seiko 6157-175