Here's a nice budget friendly example of an 1867 20 Francs from Belgium. Your typical LMU 20 Francs coin as far as dimensions and weight, but with a killer beard on King Leopold II there, and a very nice Belgian shield on the reverse.
And for the record, I'm not about to start apologizing about owning a coin of Leopold II. May as well preempt that argument here by stating there won't be any apologies on my part. I just got done having a rather unpleasant discussion with someone on Reddit over this coin who doesn't understand the fact that history is often controversial and not pretty, and that numismatists preserving and enjoying coins that represent a slice of a time long gone doesn't constitute an endorsement of any and/or all bad things people may have said, done, believed, thought, whispered, entertained, imagined, or endorsed during the era the coin is from. What a sad time we live in when being a numismatist makes you a bad person.