Seiko Cal. 3863 - 957

This Spring Drive model from 1990 features a 46mm PVD Black case. With its 20mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-e71669affa8d]

Also known as: Sumo, Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

10.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

White

Jewels

32j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1990

Related Models

• Seiko 6127-487
• Seiko 4424-253
• Seiko 6276-766
• Seiko 7172-616
• Seiko 4468-312
• Seiko 6653-587
• Seiko 7191-126
• Seiko 6650-432
• Seiko 0784-210
• Seiko 7185-998
• Seiko 7022-351
• Seiko 4423-991