My great-Grandfather worked for the Pennsylvania Rail Road. I never knew him, but my Grandfather said his dad referred to locomotives by their engine number. Keeping up the tradition, my family always called their cars by their model year. I still have the only car he ever bought brand new. We have always called it "The '64." We usually take it to the cemetery to pay respects. I think the big industrial sense with a BC xmtr is like an old locomotive, so "The 300-G" it's always been.