That happens frequently, Clem. That shaft is thin and even a tiny bit of sideways movement will snap it. The truth is it can be replaced but only if you were fortunate enough to have left the same size stub sticking up on the other side. The bad news is I should tell you that almost never happens. Carefully unscrew the two screws holding on the front plate and let us see a digital image of what you have left to work with there. If you have even a bit of stub which is the same diameter, you can get a piece of brass tubing and use it to make a collar which can be either epoxied or soldered on...depending entirely on your skill level. I have one of these sitting in a box which I've not repaired because it is going to require disassembly and some machining. Maybe I ought to get it out and take a look. I'll do that this evening. First let's see what you have. Please be careful with those two screws. They might not want to release easily. The good news? It is just a speedo needle shaft and there are ways around it, I'm sure.
