Felsa 171
Description
The Felsa 171 was available in different versions, differing by color and for example by the escapement wheel cap jewel, which was, if avaibable, framed by a very nice silver colored plate like on old pocket watch movements.
All versions have got the same balance component in common: The slit bimetal balance beats with contemporary 18000 A/h. The effective length of the hairspring is set by a long regulator arm. The escapement controls a conventionally constructed pallet anchor movement with nicely old-fashion designed bridges.
version without escapement wheel cap jewel
With or without cap jewel for the escapement wheel - this very well made movement is very beautiful!
Grundplatine
The main plate reminds a lot of those of an old pocket patch movement.
Felsa 171: Dial side
On the dial side, there’s no surprise. This movement uses a yoke winding system and the non-shock-protected balance runs in bearings with cap jewels.
On the silver-colored version, the digits “43” are stamped onto the dial side - whatever this means.
Timegrapher result
golden-colored version This specimen was cleaned and olied. The timegrapher outputs for this, more than 60 year old movement, are impressive!
crown right (12 up)
crown up (3 up)
crown left (6 up)
crown down (9 up)
dial up
dial down
Technical data
| Manufacturer: | Felsa |
| Caliber: | 171 |
| Size: | 7 3/4''' (measured: 17,3mm) |
| A/h: | 18000 |
| Number of jewels: | 15/16 |
| Escapement: | Pallet lever |
| Balance types: |
bimetallic screw balance |
| Shock protection(s): |
none |
| Balance bearing / direction hairspring: | Clockwise |
| Moveable stud: | no |
| Adjust mechanism: | Long regulator arm |
| Construction: |
|
| Winding mechanism: | yoke winding system |
| Setting lever spring: | 3 hole(s) |
| References: |
Ebauches: 1928 Flume: 1947 20 |
Usage gallery
Supera ladies' watch (dial only)