apache/cheyenne,
I think these codes for Dupont are correct (these codes are for '55-'57 and they should be the same until '59 - most likely the same in '60):
DUCO: 246-72961
DULUX: 93-72961
Dupont DUCO Lacquer mixing machine formula 2059
I do not have PPG/Ditzler codes but you might want to to try to find the phone number for their paint library. If you find the phone number, would you please post it here? They have a great library and helpful people (it might even be on-line now, but I cannot find it). I called them 6 years ago and they were quite helpful - I lost the phone number.
Good luck,
Tim
