Help identify this older compressor

[haanzel]

I am not finding much with the info given. I know the R15 is a good pump but
does anyone know what model? How many CFMs? Approximate age?

https://dallas.craigslist.org/dal/for/d/itasca-champion-air-compressor/7190706811.html

 

[930dreamer]

15-19 cfm @ 5hp.