Seiko Cal. 4431 - 587

The Seiko 4431-587 represents an important milestone in Seiko's 1973 lineup. Powered by the 4431 caliber with 36j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-2bea5787bc9b]

Also known as: UFO, Golden Tuna

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

30m

Dial Color

Silver

Jewels

36j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1973

Related Models

• Seiko 5646-820
• Seiko 4432-108
• Seiko 6168-896
• Seiko 7174-208
• Seiko 7022-387
• Seiko 7168-415
• Seiko 6172-669
• Seiko 6310-909
• Seiko 6277-250
• Seiko 6179-773
• Seiko 6371-481
• Seiko 5238-302