The Eaton Numerical Counter was used on most of our standard test machines built prior to 2013. Please look at the picture on this page and compare it to the counter on your tester. If they match, and you are confident that the counter needs to be replaced, then this is the item you need.
Recently we have been using a different counter from Automation Direct. Please also look at that listing on our website. These two counters are very different, and the wiring is also different. Please be sure that you are selecting the counter that matches the one already on your tester.