The perforations on your stamp are the same on every side, below I have taken the top perfs of your stamp and digitally aligned them to the three others sides. As you can see, they align perfectly, so the perfs are the same on each side.
Did you use a perf gauge or are you trying to count the perforations?
If you do not already have a perforation gauge, you can download a free paper one for temporary use herehttp://stampsmarter.com/learning/Fo...rfGauge.html
Edit: I can give you the answer but am assuming/hoping that you would like to learn more and not just have an answer supplied.