Dwell Angle And Tachometer Model BT-162 Vintage Accurate Instrument Co. Inc.
I bought this recently at a local estate sale. I don't know much about it. I picked it up because I thought it might be of value to someone. It's untested. The wires are approximately 4 ft long. The bottom looks like it's suffered a little melting, but should not affect its function. See photos for details.