Seiko Cal. 3874 - 991

The Seiko 3874-991 represents an important milestone in Seiko's 1966 lineup. Powered by the 3874 caliber with 17j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-e3abff6ee376]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

13.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

Black

Jewels

17j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1966

Related Models

• Seiko 4442-661
• Seiko 5664-508
• Seiko 6273-379
• Seiko 0796-737
• Seiko 4584-437
• Seiko 7186-388
• Seiko 6297-791
• Seiko 4413-700
• Seiko 7195-167
• Seiko 6341-690
• Seiko 4530-958
• Seiko 4417-783