The Sears Engine Analyzer 28-21423 Vintage is an analog diagnostic tool designed for automotive use. Made in the United States, this engine analyzer by Sears includes cables in the box for easy connection and analysis. With a manufacturer part number of 28-21423 and 161.214230, this vintage tool provides a reliable and accurate way to diagnose engine performance and troubleshooting issues. Perfect for auto mechanics and car enthusiasts looking to properly analyze and maintain their vehicles' engines. Unable to test.