Another one - that's it, that's enough, stop buying them. This one is complete with casing - not exactly the right casing, but it's hidden under the car and can be adapted. It save the expensive job of making a casing from scratch.
This is a slightly later model as there's a ratchet just below the handle (at the bottom of the picture). This can be connected to the clutch pedal so that every time you change gear, the handle is automatically rotated a bit instead of doing it manually. This would have been on an early thirties Lagonda.