“The Bobby Orr RC is definitely the hardest counterfeit to spot, as there are many different variations and very minor imperfections compared to the authentic RC. On one batch of reprints there is a circle interrupting the grid lines on the back of the card, underneath the 1965-66 text. Other reprints will show the traditional dotted black lines, although it is not as blatant as other reprint cards. Another area of the card you can look at for counterfeit detection is the “Bobby Orr” on the front of the card. If the yellow text is not solid, but shows some red dots in the background, I would question the authenticity.”
I found this paragraph a bunch of times online. Definitely look at the back of the card because I believe it is easiest to figure out the authenticity from the details on the back. The front looks pretty good though.