The buttercup comb is supposed to be completely around and able to hold a small amount of water.Most combs are open in the back or seperated.If you raise a lot you can get some good combs.In some countries they come in other colors,I think there is a silver version not unlike the Standard gold ones.There are black ones and all white ones (I think the whites were also known as Coventry Whites).One of the old American breeders was named Cook.He bred and promoted them for years.Some of the old Reliable Poultry Journals had articles on the Buttercups 100 years ago.