Seiko Cal. 4431 - 612

This Automatic model from 1965 features a 37mm PVD Black case. Powered by the 4431 caliber with 26j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-a78394afb2df]

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Black

Jewels

26j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1965

Related Models

• Seiko 6245-246
• Seiko 4571-599
• Seiko 4486-824
• Seiko 5279-222
• Seiko 7141-782
• Seiko 4464-120
• Seiko 5216-900
• Seiko 5625-111
• Seiko 4459-813
• Seiko 5672-915
• Seiko 0786-370
• Seiko 4495-324