Seiko Cal. 5631 - 900

The Seiko 5631-900 represents an important milestone in Seiko's 1973 lineup. It features a White dial protected by a Acrylic crystal and offers 190m of water resistance. [seikata-wm-b0edacda7c5c]

Also known as: Crown

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

11.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

White

Jewels

33j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1973

Related Models

• Seiko 7187-475
• Seiko 7044-196
• Seiko 6392-277
• Seiko 3826-512
• Seiko 4583-290
• Seiko 7068-497
• Seiko 7041-125
• Seiko 6359-318
• Seiko 0722-517
• Seiko 6132-503
• Seiko 6180-370
• Seiko 3817-327