When cleaning the gauges on my 1966 MGB, I discovered that what I thought was a metric Smiths speedometer was actually just a printed piece of paper glued to the face! It had me fooled, and seemed like an clever and inexpensive way to convert a speedometer from miles to kilometers. So, I scanned the paper overlay and cleaned up the image a little in case it's useful to anyone else. If you require a metric speedo for importation, licencing etc, just print this out, cut it out and stick it to the face. It may take some playing with your printer settings to get it to print at the right scale.
Click the image to view a printable version:
Here's how it looks installed. Looks pretty good to me.
Thanks to Chris Williams for cleaning up the graphics and adjusting the scale.