Seiko Cal. 0728 - 411

This Spring Drive model from 1968 features a 40mm Gold-Plated case. Powered by the 0728 caliber with 30j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-8d0d5e5f8eb5]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

11.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

Green

Jewels

30j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1968

Related Models

• Seiko 5271-996
• Seiko 6347-646
• Seiko 3868-103
• Seiko 6635-395
• Seiko 7040-412
• Seiko 6671-989
• Seiko 7024-382
• Seiko 6244-798
• Seiko 4489-511
• Seiko 0714-501
• Seiko 4510-281
• Seiko 6168-828