I think Sylvania has their hands in a lot of panels of different pedigree, so the panel type matters. What are the approved breaker types listed on the label for that panel?
I have a Challenger panel, and I found documentation that CH BR breakers are an authorized replacement. Whether you can use a quad breaker is another question -- does the panel schematic show a number of poles that makes sense for quads (e.g. showing 40 poles and there are only 20 or 30 slots)? If it is a 40 slot panel, then it was not approved for any tandem breakers.
Looks like you have aluminum wire to contend with too.