Seiko Cal. 3857 - 401

This Spring Drive model from 1987 features a 37mm PVD Black case. Powered by the 3857 caliber with 20j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-45885a004f92]

Also known as: Goldfeather, Bellmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

20j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1987

Related Models

• Seiko 3812-638
• Seiko 7155-499
• Seiko 6616-309
• Seiko 6125-677
• Seiko 7196-442
• Seiko 5278-883
• Seiko 6290-815
• Seiko 5258-643
• Seiko 4460-717
• Seiko 5271-975
• Seiko 6118-629
• Seiko 5645-869