Gibson Mastertone 4 string banjo

I have a Gibson Mastertone 4 string banjo.It has at one time had a broken headstock and was repaired.It was not a very good repair job.It has a 24 notch top,with a mahogany body.The serial # is 0429-5.The top needs replaced and is missing a bolt to connect to the body and bridge,but could be put in playable condition.It has the original Grover tuners.