Seiko Cal. 3840 - 658

This Hand-Winding model from 1968 features a 39mm Titanium case. Powered by the 3840 caliber with 30j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-cefb4defc438]

Also known as: Sea Horse, Emperor

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

14.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Champagne

Jewels

30j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1968

Related Models

• Seiko 0764-339
• Seiko 4487-554
• Seiko 3843-209
• Seiko 5277-632
• Seiko 6610-437
• Seiko 6131-735
• Seiko 6239-328
• Seiko 5286-675
• Seiko 5262-520
• Seiko 5659-778
• Seiko 6112-208
• Seiko 3886-788