Seiko Cal. 4431 - 866

This Hand-Winding model from 1982 features a 44mm Gold-Plated case. Powered by the 4431 caliber with 28j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-da525f011a9b]

Also known as: Sumo, UFO

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

13.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

White

Jewels

28j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1982

Related Models

• Seiko 6681-301
• Seiko 6315-921
• Seiko 4474-155
• Seiko 6311-728
• Seiko 6397-497
• Seiko 6356-957
• Seiko 6284-283
• Seiko 4533-173
• Seiko 5250-328
• Seiko 6630-674
• Seiko 0720-490
• Seiko 7159-647