Any childhood injuries or gardening cuts, aches, pains, headaches, splinters,, anything he could rub it on he did! We smelled horrid after he had put it on though. He used to order it from the factory in Barnstable. Just googled it and a man from the area has written a novel called "Indian Balm" inspired by the stuff!
Just had a look at a site called picclicks.co.uk and found the image, there are loads of "vintage" packets and tins on there for a bit of nostalgia. My late dad would find it very amusing to see how much people pay for the old stuff.