This vintage AC Tachometer is a must-have for antique tractor owners. With the ability to accurately measure RPM, this hand-held gauge meter is perfect for monitoring engine speed. It is suitable for various applications including PTO engines. The unit is made in the United States and has been designed to withstand the test of time. The AC Tachometer is a type of meter that measures the speed of rotation of an object. It is ideal for those who require accurate readings for their antique tractors and other machinery. This unit is sold as a unit type and is suitable for a variety of applications. Get your hands on this vintage RPM gauge meter and keep your machinery running smoothly.