Seiko Cal. 5631 - 412

The Seiko 5631-412 represents an important milestone in Seiko's 1968 lineup. It features a Green dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-fb9dde0e30d0]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

10.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

180m

Dial Color

Green

Jewels

28j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1968

Related Models

• Seiko 6149-636
• Seiko 4513-162
• Seiko 7191-599
• Seiko 4450-964
• Seiko 0715-810
• Seiko 6696-538
• Seiko 6185-307
• Seiko 7079-973
• Seiko 6191-610
• Seiko 4585-292
• Seiko 5274-735
• Seiko 4599-945