There is some confusion between RS0001, RS0002, and RS0003 and mostly I have received these perus from Kakster with the ambiguous “RS0001-3” label. THIS specific cutting on this page grew from a cutting from Kakster labeled as RS0001. This is the “matucana type” RS peru as opposed to the “argentinensis type”.
“Thirty years ago, I got RS0001 from the defunct Sticky Business nursery in Sebastopol, California. I got RS0002 when a cactus collector who was moving out of the country gave me his collection, which was mainly [peru] that he had obtained form various local sources and that looked identical. I got RS0003 from Makuto Kimura's defunct nursery near Gilroy, California. All three varieties looked similar but had a distinct appearance that enabled me to recognize them without using labels. But when cultivated in the same location, they all transformed to look the same, so for the most part I could not tell them apart except for a few that had plant tags. Live and learn. Therefore, when I distribute that variety, which is very likely all one clone anyway or at least siblings form the same batch of seeds, I label it RS0001-3” -kakster
From my current observations in my garden I believe there are at least two separate clones represented by RS0001-3. (JS)