I was just curious if anyone could point me in a direction on how to read transformers that are not industrial transformers? I ask this because I'm new to the field of electronics and I found an old transformer from my grandfather and the only information written on it is PT-54-A next line B1-00354F. I've been searching online for tutorials on how to read the nameplates of transformers but nothing of value has turned up. I tried searching with just PT-54-A and nothing came up at all. Thank you for your time.