I was pulling a Pentel RC-36 Clic Roller out of the case there other day and I saw that I had not said anything about these other great roller writers in some time. We start on the left with five R-3s. three of them are different. Then two Green R-4s, three Black R-4s, Four Blue R-4s and Three Red R-4s. In the 70s and 80s you could get refills in all four colors. Now just black. Next we have two R-6s and three R-7s. The R-7s were shinny gold color with black stripes. Last in the row are two Sterling Silver rollers. At the bottom is a R-7 in a plastic case then the 24 Karat Gold Plated roller and another Sterling Silver roller. By far these are my favorite pens of all time. I bought my first one in 1978 in Mainz Germany. I think this is a complete set of these type rollers but if anybody knows of a roller that should be in this collection please let me know. Add them all to your collection.