Seiko Cal. 3878 - 941

This Spring Drive model from 1968 features a 39mm PVD Black case. With its 22mm lug width and 13.3mm profile, it sits comfortably on most wrists. [seikata-wm-00327e2191a0]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

13.3mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Silver

Jewels

19j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1968

Related Models

• Seiko 4489-626
• Seiko 7131-997
• Seiko 7159-564
• Seiko 7130-833
• Seiko 6146-930
• Seiko 0784-373
• Seiko 6269-626
• Seiko 4450-284
• Seiko 6214-645
• Seiko 6640-610
• Seiko 6183-180
• Seiko 5647-799