This vintage Ray-Tek thermometer is a reliable temperature measurement tool that will be a great addition to your collection. The analog display ensures accurate readings and the unit is designed to withstand heavy industrial use. It comes with a 5-pin connector and is marked with the model number R5 and serial number 516. Made in the USA, this unit is a testament to American craftsmanship and quality. It is perfect for use in a wide range of industries, from manufacturing to laboratory testing.