PAD
Your company may have evolved into PAD at KDCA.
We flew Beech 18's, and they had a couple of Aztecs, as well.
They also had an operation at Santa Barbara, CA with a couple of Aztecs.
We flew military stuff, Class "A", and also the stuff with the armed couriers.
A Mr. & Mrs. Hess owned the company, and I don't know where they were from, Maybe OK?