As hard as it is to believe that one of these "new in the box" gauges still exists, here is an early 1960's S/W supercharger gauge. These were used in the Paxton supercharged R2 & R3 Avanti & were offered by Stewart-Warner in the aftermarket. As it should be, the gauge is in beautiful condition. The needle responded nicely in the suck/blow test. It fits into the standard 2-1/16" hole. This would be a great "stand alone" gauge for any supercharger, especially in a cup, but would not be out of place next to similar 1960's Stewart-Warner gauges...the bezel, glass, cup & needle are no different than those gauges. And, here's a wild card. If you'd be looking for gauges, to match it, I have this array of very similar gauges that I picked up at Hershey a few years ago. It's strange that they match so well, because they were made in Taiwan, which would not have been a bit later in time. Anyway, the gauges & panel are beautiful & look to be of high quality & work well, The temp, pressure & vacuum are mechanical. They do come out of the panel, so maybe you could replace the vacuum gauge with the supercharger gauge, as it would be redundant. If you would buy the supercharger gauge, I'd throw in the panel for $75. The price is plus shipping...$15 to the lower 48. PayPal (F&F) or a Postal Money Order would work. The first P.M. committing to buy gets it.