Seiko Cal. 5631 - 162

This Automatic model from 1976 features a 44mm Two-Tone case. With its 21mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-56015917d3da]

Also known as: Helmet, UFO

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

44mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Silver

Jewels

21j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1976

Related Models

• Seiko 7069-661
• Seiko 4491-522
• Seiko 4454-100
• Seiko 6626-275
• Seiko 0712-322
• Seiko 6116-576
• Seiko 3894-354
• Seiko 4453-935
• Seiko 6134-370
• Seiko 3851-270
• Seiko 0767-446
• Seiko 4455-826