[vinyl master]

So, my radio buddy has offered to take a look at it for me, but I still had a question...I've noticed that the models PT-2, 42-PT2, PT-10, 42-PT10, 46-250 and 48-250 all look very similar, and possibly the same chassis was used for these different models...There is nothing to indicate a model number on the inside of my radio and it looks like someone put a wooden back on this radio...Not sure if it's original, either...The knobs look like ones I have seen on earlier Philcos, so they may be from another set entirely...My question is this...With all those model numbers using the same chassis, how does one tell them apart? Is there a way to know which is which?