Jeremiah In watching ebay, I found two listings of 1956 Pontiac radios for sale (might be more) and came up with two model numbers. 984961 & 988568 Tube line-up in the receiver is 12BA6, 12BE6, 12BA6 & 12BF6. In the speaker/power unit are 2 - 12V6's and a 0Z4. I lost the original posting, so is this the answer you were looking for? Aaron Hunter