Years back, my very first machine was a 1956 United Shuffle.
It came with a burned out Transformer. It had a fuse in both
the Normal and Low Line fuse holders. Although I can't say with
certainty it contributed to burning out the Transformer, I do know
a fuse should never ever be in both. By the mid 70s, in the U.S., the
low line fuse holder was no longer needed. I now usually cut the jumper
going to the low line fuse holder.
When blowing fuses, a breaker (with a blowing AGC fuse solder to
it's terminals) is a good item to have on hand. It saves from blowing
additional fuses. Here a 15 Amp breaker, but they have at least up to
30 Amp. If buying one, I'd pick up a 10, 15, and 20 amp also..
https://www.tti.com/content/ttiinc/en/apps/part-detail.html?partsNumber=W58-XB1A4A-15&mfgShortname=TYC&customerPartNumber=&minQty=2&customerId=