Felsa 90

Felsa 90 | 17jewels.info - The Movement Archive

Felsa 90


The Felsa 90 described here is one of the latest cylinder movements of a ladies' watch and was probably made in the 1940ies or even 1950ies.

Originally, it was made by AM und had the same caliber number there, AM 90.

Its measured size is 19.6 x 12.6 x 4mm (= 8 3/4 x 5 1/2 lignes, although it was listed in the Flume K1 with 5 1/4 lignes) and it contains 10 jewels.

This movement used the patent DE652036 from AM, which describes the fast releasing mainspring barrel.

Felsa 90: minimally modified version

minimally modified version

As you can see on the details, this movement was a bit reworked during the production time frame.

Felsa 90: Felsa 90 dial side

Felsa 90 dial side

Felsa 90: dial side, different version

dial side, different version

Technical data

Size:5 1/4''' (measured: 19,6 x 12,6mm)
Number of jewels:10
Balance types: Nickel anular balance
Shock protection(s): none
Balance bearing / direction hairspring:Counterclockwise
Moveable stud:no
Adjust mechanism:Long regulator arm
  • escape wheel
  • seconds wheel, third wheel, center minute wheel
  • mainspring barrel
Winding mechanism:rocking bar winding system
Setting lever spring:3 hole(s)
References: Flume: 1947 46

Usage gallery

Felsa 90: Ecly ladies' watch

Ecly ladies' watch

Felsa 90: Ormo ladies' watch

Ormo ladies' watch

Felsa 90: Kasta ladies' watch  (dial only)

Kasta ladies' watch (dial only)

Felsa 90: Gam ladies' watch

Gam ladies' watch