Help with CAD and small brass gear

[Dan from Oakland]

"If the mate is in good shape, then getting number of teeth, base pitch, a measurement over wires, OD, face width, and the center distance of the "mechanism" holding this set of mating gears will allow designing (and making) a replacement from scratch that will function correctly."

What!!! are you actually proposing to make the gear correctly and have it mesh like a real gear??????
Surely you jest!!