AB-4 is a discontinued acoustic bass from Taylor. A shame they quit making them. These were GREAT Acoustics...
hard to find on eBay anymore. Just saw one here in Nashville on CL going for $2500
Hope you got a good deal on it. I'd love to have one, but won't do you the dishonor of low-balling you on it. You'll get a premium for it, and that bass deserves it. Congrats
It's not a thumb rest...it's a pull bar!