Seiko Cal. 5631 - 395

The Seiko 5631-395 represents an important milestone in Seiko's 1975 lineup. Powered by the 5631 caliber with 21j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-c2eaf65d4093]

Also known as: Navigator, Arnie

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

34mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1975

Related Models

• Seiko 6645-305
• Seiko 7028-797
• Seiko 3842-607
• Seiko 4553-125
• Seiko 6396-870
• Seiko 5270-844
• Seiko 7088-316
• Seiko 5286-646
• Seiko 3854-971
• Seiko 6684-999
• Seiko 6188-131
• Seiko 5240-791