Seiko Cal. 4428 - 290

This Spring Drive model from 1970 features a 46mm Stainless Steel case. It features a Silver dial protected by a Acrylic crystal and offers 90m of water resistance. [seikata-wm-d178e7f20c11]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

12.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

26j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1970

Related Models

• Seiko 5294-596
• Seiko 6698-307
• Seiko 5241-683
• Seiko 3867-276
• Seiko 7190-371
• Seiko 7071-630
• Seiko 7154-979
• Seiko 4549-528
• Seiko 5673-923
• Seiko 6127-311
• Seiko 6234-699
• Seiko 4443-337