Ok, I just recently purchased a zip bowler in black. Does the under side of the zipper have to have the RIRI/M# on it to be real or is that only for certain handbag styles? I have the one with the canvas inside lining (which I guess is the lining for the bags sold at non MJ boutique stores). Everything else about the bag seems accurate but I just want to make sure what I should be looking for to ensure authenticity. Thanks for your help.