Seiko Cal. 4528 - 641

This Automatic model from 1968 features a 46mm Two-Tone case. The Inner Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-d02ac70890bb]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

46mm

Case Thickness

12.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1968

Related Models

• Seiko 5261-129
• Seiko 7133-888
• Seiko 7027-717
• Seiko 7161-325
• Seiko 0751-441
• Seiko 6388-541
• Seiko 4484-473
• Seiko 5633-871
• Seiko 7110-279
• Seiko 7153-541
• Seiko 4568-320
• Seiko 4543-896