[Brad Winder]

Honestly, most Philco sets in any given model year used very similar specifications, with only minor build differences. Size and how they mounted seems to be the variable. As long as you are close with the field coil and voice coil values, you will most likely be good. There isn't a lot of information available on the later 30's and 1940s-50s speakers like there was on the 1928-36 models. I have the speaker data sheets on earlier sets and pretty much all specifications including acceptable substitutions are listed in the sheets.

Anybody ever come across data sheets for later sets?