Seiko Cal. 4430 - 447

The 4430-447 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4430 caliber with 30j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-d1125a23ece7]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

11.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Green

Jewels

30j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1969

Related Models

• Seiko 6147-776
• Seiko 6270-152
• Seiko 5637-114
• Seiko 3815-870
• Seiko 6381-993
• Seiko 5674-351
• Seiko 6131-344
• Seiko 7187-211
• Seiko 6331-123
• Seiko 7037-107
• Seiko 6672-624
• Seiko 4564-392