This was a hit by the Harmonicats back in the early sixties, I'm thinking. I happened to correspond with the last living member a few years back. In the original, the harp playing melody was modified (I don't remember how) to make that opening bend much deeper.
I really like harmonica trio music. I hope these young men stay at it. Harmonica trios are hard to come by these days. ---------- Wisdom does not always come with old age. Sometimes old age arrives alone.