Seiko Cal. 4429 - 421

The 4429-421 is a sought-after Spring Drive piece from Seiko's golden era. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-a6007faf9028]

Also known as: Bullhead, UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

33j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1967

Related Models

• Seiko 6625-836
• Seiko 4521-602
• Seiko 6169-562
• Seiko 3823-767
• Seiko 6349-357
• Seiko 6245-404
• Seiko 5210-879
• Seiko 6675-702
• Seiko 4445-165
• Seiko 5683-551
• Seiko 5689-838
• Seiko 4511-646