The countless discussion here should have supplied you with all the basic info so I am a bit puzzled by your questions.
First, assume that the chances of having a 594/596 is near zero. Second put away the ruler; the tolerances and dimensions given will never allow you to actually ID a 594/596.
Have you gone through the 2-3 hours of info on Stamp Smarter? For example, this link which shows you how to make a template? http://stampsmarter.com/learning/Ma...methods.html