Are the fender skirts for a 1949 98 compatible for use on a 1950 98?

 

They should since the cars share the same body which was new in 1949.

 

In the parts book, Oldsmobile calls them rear fender streamline panel; group 8.175.
For the 1949 98, it shows R.H. part number 554132
L.H. part number 554133
For the 1950 98, it shows R.H. (less seal) part number 558218
L.H. (less seal) part number 558219
Perhaps the presence or lack of the seal accounts for the difference in the part numbers. The part numbers for 1949 98 are the same for 1948 98. The part numbers for 1950 98 are the same for 1951 98.

 

Thanks