Mechanical tachometer

[MartinH]

I bought a speedo of the same pattern from an Indian eBay seller for a non-Austin application. The odometer has worked perfectly but the Speedo waved about a bit for the first few hundred miles and has now jammed at 30mph. I haven't stripped it down but assume that the spinning disc component (drag cup ?) has collided with the driven parts. I am not too fussed and have left it in place as a functional odometer. You get what you pay for and for less than 20 quid delivered I didn't expect much.