My brother has our old one, it weighs a ton! He doesn’t have a landline, it’s for ‘decoration’
Had an inlaw who kept several of his younger days crank telephone “boxes” as they were called. The handle outside cranked a fairly powerful magneto inside the box- sending a dedicated line signal to a central operator (as in “Hello, Central, please connect me to GARDEN 5 2719== or GA 5 2710 for example).
He rigged up a couple of the crank magnetos to baited squirrel stations in the attic made of copper plate wired to the magneto, and the plates when stepped on completed a circuit to a small light downstairs on a panel next to the two boxes. Light came one— a fast crank fried the squirrel, usually throwing it across the attic with an audible thump.
Said it was very satisfying to clean out the pesky squirrels. That was some current. Units in Army radios based on the same principles wires run to HQ in trench warfare.