Help with a mystery vintage amp head

An electronics repair guy gave me this amp head with no markings on it. It looks homemade or from a kit. It has 4 nine pin tube sockets and four right pin tube sockets, 2transformers and some old looking armaco caps. Where kits common back in the day? What where they modeled after? I thought the knobs might be a good way to date it. Annoying that I can't post pics of it, any leads would be greatly appreciated. Thanks