Beatles "She Loves You" on Swan label

I have a rare 1st or 2nd pressing of this title on Swan. This is the purple printing on white label NOT the common silver printing on black (3rd pressing). Does anyone know how to spot counterfeits or whom I can contact that may be able to help out?
Hmmm, well purple on white would be a problem. Real ones will have red or black print on a white label. I did have an extremeley rare one sided promo with cyan print. If you can send me a scan and tell me what is stamped in the trail out vinyl (not hand etched), I can tell you about it. Note that it was counterfeited in 1982. Tom