Seiko Cal. 3878 - 305

This Spring Drive model from 1968 features a 40mm Gold-Plated case. Powered by the 3878 caliber with 34j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-08d599cd7cbd]

Also known as: Sumo, Goldfeather

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

8.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1968

Related Models

• Seiko 5612-505
• Seiko 6186-393
• Seiko 3818-386
• Seiko 6615-435
• Seiko 6153-562
• Seiko 7063-705
• Seiko 3820-612
• Seiko 6181-633
• Seiko 4447-176
• Seiko 7119-987
• Seiko 6162-136
• Seiko 5622-122