This is a 6-course, 12-string bandurria. Normally, the back is flat, but this is a rare model with a beautifully carved body. It's similar to a mandolin, but with more strings. Since it has 12 strings in 6 courses, you can play it with a guitar-like feel. (The actual tuning seems to be slightly different from a guitar, but I used to play it with the same tuning as a guitar.) It produces a rich and deeply resonant sound. However, I stored it without loosening the strings, and now the strings get stuck when pressed down with a finger. It needs some adjustment in that regard, so I'm offering it at a bargain price. (It seems like raising the height of the bridge would fix it, but I'm not an expert, so I'll leave it to the buyer's discretion.) The appearance is as shown in the photos, and there are some minor scratches, so please understand this before purchasing. How about it for those who enjoy unplugged performances with a rich sound? Thank you.