As I do not know the exact model being discussed, I am not sure whether this is off topic or not. I am led to believe that it is a Raleigh version of the Moulton which I understand to be on-topic. The owner tells me that RSW stands for Raleigh Small Wheel.
In any event, my friend in Argentina would like to sell his circa 1970 Raleigh RSW. He describes it as being in perfect original shape. It is black with gold decals, with original Raleigh tires, Raleigh handgrips, sturmey archer hub gear. He would like $200 plus shipping for the bike. If you are interested, please let me know and I will put you in contact with the seller.
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Steven Maasland
Moorestown, NJ