Blue Point double open end ratcheting wrenches.
The history of these is a bit confusing. There are some RBxxxx models that I do not see in the cats. The first RSxxxx model that shows up is the RS1618 in the 41 cat. Then some years have the four piece RS set and some years show the seven piece set. Am not sure when they last show up as Blue Point. There are also some ratcheting end combination wrenches from about 1940. http://toolarchives.com/?q=node/535
A couple of RSxxxx wrenches. Note that made in USA is not on these, also has large font. No date codes. Would probably date mid 30's
The RSxxxx models. This set of seven have a 1948 date code.