Seiko Cal. 3856 - 990

This Quartz model from 1978 features a 40mm Titanium case. Powered by the 3856 caliber with 24j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-f4d122d75f0d]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

40mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

110m

Dial Color

Cream

Jewels

24j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1978

Related Models

• Seiko 3837-720
• Seiko 6135-596
• Seiko 6265-452
• Seiko 6282-416
• Seiko 7033-187
• Seiko 7026-476
• Seiko 4448-681
• Seiko 5287-749
• Seiko 5664-599
• Seiko 4445-147
• Seiko 6365-351
• Seiko 4513-455