looking for info on a model 75 armstrong furnace
Dennis, if it’s a G75 (oil) model number it’s probably a 1977, if it’s not your going back to the 60’s or older.
thanks Gerry, it was a oil furnace, I like to snap a picture of all the tag info,
forgot to shut off the flash silver tag + flash = fuzz.
Providing model and serial number from the data plate would help.