I think this was purchased in Italy by my dad in 1963. He had it on his Sprite, then I had it on my Sunbeam Alpine in the 1980s. I sold it with the car by mistake then had to track down the new owner and beg for it back. Wish I could use it on the 7, but I’m not sure if the diameter will work.  

I’ve been collecting gauges from ebay whenever I see a good deal. These are Smiths from MGB and Spridget applications. Maybe not exactly correct, but they match and are suited for the period.