I know this post is over a year old. But I thought I'll add a correction. After all, we should try to become the ultimate reference place for rare cars, so precision is necessary
The Beskid 106 (don't know why you have the L in the name, never heard of this before) was a project by FSM, not FSO. FSO dealt with the bigger cars (Warszawa, Fiat 125p, Polonez) while FSM was responsible for the small cars, e.g. Fiat 126p/Bis and Cinquecento. FSM became Fiat Auto Poland in 1993.
As for Syrena, it was built in FSO until 1972, when the production was transferred to FSM.
Or, to be even more precise
Beskid was made by BOSMAL, which was the R&D facility of FSM. 7 cars were made, 4 still exist.