Pics here are really the best way.
You could take it to a store like Chloe or Saks or NM, etc and ask the SAs. But I don't think they like to do that. Also, I suspect we are all more knowledgable in many ways than the SAs. Everytime I visit the Chloes the SAs are clueless about the variants and finer points of the handbags.
Good luck!!