This is most likely a 1966 Gibson acoustic guitar. The pictures of the two, almost identical guitars side by side were taken at a local music store. Mine is the one on the left, the one that doesn't have "Mike" on it. They told me that "experts" have told them that the tuners aren't original on the one they have for sale. They said with mine being the same as theirs, it proves they are original and were probably a small number produced with that specific tuner on it. They said they have laid eyes on four Gibsons so far with that same tuner. They are selling theirs in the store and they currently have mine on consignment. Once a bid is placed here on eBay, I will immediately call them and pull mine off the shelf with them. This is a vintage guitar that belonged to my grandmother. Good luck!