I have the following information:
PPG #60080 - listed as "persian orange" by PPG
PPG #60396 - listed as "persian orange" by PPG
DuPont #655 - listed as "persian orange" by DuPont
DuPont #29047 - listed as "allis chalmers orange" by DuPont
I have personally confirmed that PPG #60080 is the earlier orange...referred to on this board and others as "persian #1". PPG#60396 has significantly more red in it and likely is the "persian #2", so called.
I have not confirmed the DuPont numbers as to which is which but suspect the 655 is the earlier pumpkin shade referred to as persian #1.
The above numbers are currently mixable in DuPont's NASON line and PPG's OMNI line of automotive paints.