Seiko Cal. 4420 - 447

The Seiko 4420-447 represents an important milestone in Seiko's 1980 lineup. Powered by the 4420 caliber with 18j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-5c3daeca07a3]

Also known as: Bullhead

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Burgundy

Jewels

18j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1980

Related Models

• Seiko 4562-938
• Seiko 4518-927
• Seiko 6295-712
• Seiko 3848-682
• Seiko 7088-766
• Seiko 6262-783
• Seiko 7166-208
• Seiko 7093-164
• Seiko 4587-460
• Seiko 6147-861
• Seiko 6370-873
• Seiko 7132-820