Seiko Cal. 4428 - 345

The Seiko 4428-345 represents an important milestone in Seiko's 1968 lineup. The Inner Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-a527260e7a65]

Also known as: Sumo, Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

41mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Navy

Jewels

20j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1968

Related Models

• Seiko 0736-293
• Seiko 6222-425
• Seiko 5298-243
• Seiko 5245-631
• Seiko 6698-492
• Seiko 3868-667
• Seiko 7088-278
• Seiko 5256-822
• Seiko 4544-111
• Seiko 6622-844
• Seiko 5249-749
• Seiko 4524-129