In case your neck hairs didn't stand on end at the mental image of a Gibson Granada banjo cartwheeling down a stairwell, to put it in perspective: Earl Scruggs played this one for his whole career:
http://www.earnestbanjo.com/gibson_banjo_RB-granada_mastertone_9584-3.html ... In the world of prewar Gibson banjos, there is no model more legendary than the original five-string Granada with one-piece flange and flathead tone ring. Fewer than twenty of these banjos were produced, making them many times rarer than Martin's famed prewar D-45 guitars. ...
Foggy Mountain Breakdown, the Beverly Hillbillies Theme and Will The Circle Be Unbroken were all recorded with that banjo. It formerly belonged to Don Reno, which in the bluegrass world would be the equivalent of a Strat that Clapton recorded every song on, that used to belong to Jimi Hendrix.
Oh, what the hell. I'm just throwing this weird 1915 Knutsen harp-mandolin out there because it was something I ran across while trying to find Earl's Granada, and some instinct tells me this is a pre-derailed thread anyway (my favorite kind )
The story:
http://www.vintageinstruments.com/mandolins.html It's the baby brother of Michael Hedge's 1915 Knutsen harp-guitar:
Hum-canceling headgear optional.