Vintage Kalamazoo probably a 1940’s- 50’s model going by the shape of the headstock. Sadly, no serial number on the guitar as was common with a lot Kalamazoo’s. As expected there is some age related ware and tear but overall the guitar is in good condition for it’s age. The neck is straight, frets are all good and the action is low, no breaks or repairs, the tuners have been replaced at some point.