Seiko Cal. 3859 - 728

The Seiko 3859-728 represents an important milestone in Seiko's 1972 lineup. With its 18mm lug width and 13.0mm profile, it sits comfortably on most wrists. [seikata-wm-2b3df62b0e67]

Also known as: Sumo, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

13.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

White

Jewels

19j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1972

Related Models

• Seiko 0798-469
• Seiko 4585-545
• Seiko 4488-593
• Seiko 0743-812
• Seiko 3822-209
• Seiko 0744-839
• Seiko 7091-396
• Seiko 6265-271
• Seiko 6132-218
• Seiko 6651-323
• Seiko 0711-377
• Seiko 4425-233