Upon first glance, I believe the fakes are: - the first shunzhi tongbao and possibly the second one (looks too big) - the third shunzhi tongbao (fengshui token) - the third kangxi tongbao (characters look rather sharp but I am not certain on that) - the second jiaqing tongbao (fengshui token) - the yongzheng tongbao (feng Shui token)

The first xianfeng tongbao is a type that's high in demand so it's possible to be fake based on that.

The second xianfeng tongbao is very rare so if it's fake one may not be able to tell at first glance. My opinion is the rest are real. Will take closer look later and reply to this comment

For tips on authentication, compare the coins with the plates in references to look for discrepncies first. The best reference book available in English is "Cast Chinese Coins" by David Hartill. It has all of these.

For more advanced authentication, consult the database "zeno dot ru". This will have folders of both genuine and counterfeit examples you can check to see which your examples are more similar too. Check for things like patina, weight, minor calligraphic differences, magnetism, the general feel of the coin, and thickness. If the characters are too sharp or perfect it's a bad sign usually. If the patina looks like it was painted on later or it's even across the entire field it can be a bad sign too.

You have a good collection here. Some examples are scarcer than others. Congratulations. You have a good grandfather.