Seiko Cal. 4521 - 403

Released in 1983, the Cal. 4521 with design code 403 was part of Seiko's domestic market collection. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-a667ec4fffcd]

Also known as: Helmet, Rally

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

Green

Jewels

21j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1983

Related Models

• Seiko 7137-128
• Seiko 6126-832
• Seiko 0744-802
• Seiko 7177-829
• Seiko 0745-376
• Seiko 0730-717
• Seiko 7032-835
• Seiko 6249-945
• Seiko 0774-658
• Seiko 5247-335
• Seiko 4570-133
• Seiko 4452-831