[Mondial]

As Arran said, you really do want to use film type caps for the filters in these sets. Because of their low capacitance value they are subjected to very high ripple voltages, especially the first cap after the rectifier.

Modern small value electrolytics are not designed for this type of service and will fail in a short time due to the excessive ripple current and resulting overheating.

I do have a few early AK sets with their original paper filter banks, but they are only played occasionally and at reduced line voltage. If you will be using the radio on a regular basis, then the filter replacement is definitely warranted.