I found a registration owned by Kathryn Petrich-LaFevre of Pennsylvania and it is for transformers, serial number 74492177. Maybe that is what you are talking about. But the trademark registered is for Acrosound, and does not cover Peerless.Regarding the Peerless brand name, if there was registration made by Altec, then there would be a record of it in the PTO database. I could not find it. I searched for trademarks registered by Altec and found several, Altec, Altec Lansing, Iconic, Mantaray, Tangerine, etc. But I did not find a registration for Peerless. Surely you must know a registration serial number for something so important to you.
As for a transfer, if you have made some sort of legal agreement that gave you intellectual property rights, you should have no trouble putting your hands on it. I mean, if you or your attorney were going to write someone a cease and decist letter, you'd want to include these documents as proof of your claims.
If you have other documentation I haven't found, I'd be interested to see it.