Seiko 1104A

Seiko 1104A | - The Movement Archive

Seiko 1104A


Seiko handwound movements are rather rare in Europe. Even more rare are those tiny form movement, which even contain a center second indication. Such a movement is the Caliber 1104A, which shows the high quality even of simpler Seiko movements.
The large balance with four legs is beared in an inhouse Diashock system and some of the jewels are located in chatons.

Technical data

Size:5 3/4 x 6 3/4'''
Number of jewels:17
Escapement:Pallet lever
Shock protection(s): Diashock (Seiko)
Balance bearing / direction hairspring:Counterclockwise
Moveable stud:yes
Adjust mechanism:Hairspring key
  • lever
  • escape wheel, seconds wheel, third wheel, center minute wheel
  • center second pinion
  • mainspring barrel
  • SCI (indirect center seconds)

Usage gallery

Seiko 1104A: Seiko ladies' watch

Seiko ladies' watch