Seiko Cal. 5631 - 164

The 5631-164 is a sought-after Spring Drive piece from Seiko's golden era. With its 19mm lug width and 13.1mm profile, it sits comfortably on most wrists. [seikata-wm-9b813727a255]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

13.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

110m

Dial Color

Cream

Jewels

22j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1979

Related Models

• Seiko 4472-463
• Seiko 3871-154
• Seiko 6221-662
• Seiko 6193-681
• Seiko 6158-952
• Seiko 6384-871
• Seiko 7029-654
• Seiko 6673-780
• Seiko 5276-535
• Seiko 6326-667
• Seiko 6175-497
• Seiko 5668-615