This listing is for a AutoMeter Pro-Comp Tachometer 11K RPM Gauge Vintage Silver Bezel Untested. I picked this up from a local estate. They raced speed boats back in the 80's and maybe early 90's. I believe that is what this was used for. Untested. Some light wear and small dents on the trim ring, but good overall shape for the age. It measures about 4" across the outside of the trim ring. The lens is clear and in nice shape.