Seiko Cal. 3877 - 403

The Seiko 3877-403 represents an important milestone in Seiko's 1973 lineup. The Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-f2b18a9012ab]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Silver

Jewels

21j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1973

Related Models

• Seiko 6272-608
• Seiko 4454-978
• Seiko 4542-146
• Seiko 4485-814
• Seiko 6263-469
• Seiko 7182-679
• Seiko 6667-138
• Seiko 6218-707
• Seiko 3899-434
• Seiko 4430-488
• Seiko 6359-284
• Seiko 6176-760