Seiko Cal. 3866 - 121

This Hand-Winding model from 1965 features a 44mm Hardlex-Coated Steel case. It features a White dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-8a020de283a3]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

White

Jewels

26j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1965

Related Models

• Seiko 7093-500
• Seiko 5693-992
• Seiko 4548-125
• Seiko 0780-996
• Seiko 6695-432
• Seiko 0744-774
• Seiko 0719-317
• Seiko 4487-982
• Seiko 7190-124
• Seiko 4418-336
• Seiko 5614-223
• Seiko 7024-737