Seiko Cal. 3856 - 904

This Spring Drive model from 1980 features a 36mm Stainless Steel case. Powered by the 3856 caliber with 29j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-c3bf7152004f]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

200m

Dial Color

Navy

Jewels

29j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1980

Related Models

• Seiko 3813-931
• Seiko 0724-390
• Seiko 3841-483
• Seiko 6217-539
• Seiko 5615-497
• Seiko 7065-155
• Seiko 7096-397
• Seiko 7093-909
• Seiko 7161-519
• Seiko 6146-909
• Seiko 4473-447
• Seiko 5678-734