Seiko Cal. 4431 - 647

The Seiko 4431-647 represents an important milestone in Seiko's 1983 lineup. Powered by the 4431 caliber with 33j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-1a1f3484fe00]

Also known as: Arnie, Flighty

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

45mm

Case Thickness

11.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

160m

Dial Color

Green

Jewels

33j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1983

Related Models

• Seiko 6330-991
• Seiko 6361-636
• Seiko 6623-687
• Seiko 4469-680
• Seiko 3866-590
• Seiko 3832-526
• Seiko 7196-754
• Seiko 5692-788
• Seiko 6239-481
• Seiko 6363-552
• Seiko 4583-479
• Seiko 7020-478