Seiko Cal. 3820 - 533

This Spring Drive model from 1966 features a 36mm Titanium case. Powered by the 3820 caliber with 21j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-b75d5ee2abb2]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

12.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

40m

Dial Color

Cream

Jewels

21j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1966

Related Models

• Seiko 5684-862
• Seiko 4437-338
• Seiko 3871-334
• Seiko 7130-865
• Seiko 7166-414
• Seiko 5661-975
• Seiko 4418-743
• Seiko 6627-278
• Seiko 5645-412
• Seiko 6242-123
• Seiko 4593-497
• Seiko 0790-636