Seiko Cal. 3840 - 923

The Seiko 3840-923 represents an important milestone in Seiko's 1981 lineup. Powered by the 3840 caliber with 30j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-04f40761d234]

Also known as: Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

8.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Navy

Jewels

30j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1981

Related Models

• Seiko 7194-761
• Seiko 5685-462
• Seiko 5229-379
• Seiko 5240-368
• Seiko 5616-521
• Seiko 0770-391
• Seiko 5214-375
• Seiko 5211-575
• Seiko 4517-129
• Seiko 3820-998
• Seiko 6349-276
• Seiko 6371-145