Custom Beautiful Vintage 1959 Gibson Mastertone 5 String Banjo

Here we have a beautiful vintage Gibson Mastertone 5 string banjo. It has been dated to be a 1959. I am not specific on the model. I was not able to find anything that was an exact match for this. It has Mastertone inlayed on the headstock, but not on the fretboard. The tuners are not original, and the head was recently replaced. The tailpiece says Grover patent Presto. i do not know if it is original to this instrument. The number stamped inside the banjo reads 9-548-28. The case in the photos is included.