Seiko Cal. 4428 - 604

The Seiko 4428-604 represents an important milestone in Seiko's 1965 lineup. Powered by the 4428 caliber with 29j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-6c148bb510aa]

Also known as: Helmet

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

46mm

Case Thickness

8.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Cream

Jewels

29j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1965

Related Models

• Seiko 4482-109
• Seiko 7075-623
• Seiko 6152-396
• Seiko 6321-722
• Seiko 4555-134
• Seiko 0726-586
• Seiko 3827-275
• Seiko 4480-518
• Seiko 6221-665
• Seiko 6254-402
• Seiko 6164-275
• Seiko 5682-642