Parkers are always a popular post and you don't have to say much just show where your collection is. My collection is growing and I am running out of space. It is hard to keep up with the number of new Parkers coming out of India. The Parkers in the pocket protector are the ones you could call the demonstrators. Red, green, blue and purple. Purple and blue look the same to me but I have been assured they are different. Many collectors want just the ones with the brass fittings where as I go for the different color and designs. Newer Parkers have the plastic fittings. Plenty for all to collect. Add them all to your collection.