Hi, I'm trying to i.d. an INCA transformer, told to me to be an audio output, type 1161 or 1?61 (hard to read). Does anyone have an old INCA catalog? Looks like 40's or 50's. It's about 4 x 4 x5 with 14 terminals. I hope I can use it with some on-hand audio tubes but don't know what impedance it was built for, thanks, Dan.