Here is a unique item. This was found with a small collection of whitall Tatum, Armstrong, insulators and factory shelf sample bottles. It is a tramel point made of brass. I wonder how many blueprints or insulator designs were put together with this tool. Sorry only have the one. It measures approximately 4 1/4" long. It is marked on both sides w.t. & co. Asking $100. Will ship and insure for free in continental u.s.