Old Sparton 6 volt model 195 4-trumpet musical aftermarket car horn for parts repair.  My observation are:

• fair cosmetic condition due to paint loss and surface rust along with a few dings. 
• opened up the motor side and internally looks all original in good condition
• compressor/noise making side I did not open
• cleaned armature and lubed ends.  Applied power using a dc regulated power supply and motor turns freely, cams and worm wheel work as they should.  Power supply clearly was not able to spin motor fast enough to check the compressor side, so horn is not fully tested.  As such, horn is sold for parts or repair.