Seiko Cal. 5631 - 389

The Seiko 5631-389 represents an important milestone in Seiko's 1975 lineup. Powered by the 5631 caliber with 18j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-5bed130a8178]

Also known as: Turtle, Bellmatic

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

14.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Cream

Jewels

18j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1975

Related Models

• Seiko 7087-495
• Seiko 7127-463
• Seiko 6210-820
• Seiko 7022-154
• Seiko 4428-979
• Seiko 7149-435
• Seiko 4411-248
• Seiko 4517-370
• Seiko 0735-977
• Seiko 6330-663
• Seiko 5631-531
• Seiko 4518-915