Seiko Cal. 3840 - 423

This Spring Drive model from 1983 features a 38mm Two-Tone case. Powered by the 3840 caliber with 20j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-bd71790a4515]

Also known as: Silverwave, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

38mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Black

Jewels

20j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1983

Related Models

• Seiko 0743-715
• Seiko 5697-112
• Seiko 6394-519
• Seiko 7184-524
• Seiko 6344-909
• Seiko 5649-846
• Seiko 5668-738
• Seiko 3835-530
• Seiko 0733-747
• Seiko 6379-443
• Seiko 6241-400
• Seiko 7065-273