Mahogany and Adirondack makes for a powerful combination, especially in a Collings, and of course when it's in the round-shouldered "Jumbo" body shape with a long scale you add another pair of variables. It certainly isn't an Advanced Jumbo, since it's mahogany, and it's more than just a Collings version of a J-45 with more binding and an Adirondack top when you up the tension with that longer scale. And this example adds the visual treat of a great tobacco sunburst on the top, almost certainly done by John Allison (his own guitar company wasn't quite off the ground yet). Do the math, when you add the Collings upcharge for Adirondack to what they add for doing a sunburst top, you wind up with an expensive guitar. This example sounds great and is in almost perfect condition except for very very light playing wear. Original case in the same condition.