Gibson Thunderbird IV

Inside the tiny shop, the walls were lined with quality used and vintage guitars.  The better and rarest guitars were behind the counter where the cash register was.  To the left were the bass guitars, all hanging on the wall.  During this visit, I was looking at all the basses all lined up, when I noticed that one of them wasn't shaped like the others, so it didn't fit in somehow.  As I focused on this fact , I began to think that what I was really looking at was indeed something rare and unusual.