Looking at your ad and the '39 and '40 catalogs on Tom Findley's site(http://www.trfindley.com/pg_schwinn_cats.htm), I think mine (listed as 1941) is really 1939 (or 1938 -- whatever the first year of the New Worlds was). The bikes in the supposed "1941" catalog show rear facing dropouts (as does the 1939 catalog art), but the 1940 catalog shows the forward facing "Continental" dropouts. The other 1941 dated brochure on Tom's site shows the newer style grips as well as the forward dropouts. I know catalog art is not always the best indicator of age of a bike, but it is about all I have to go on.
I picked up a lady's NW this past weekend that has the rear facing dropouts and so I've been revisiting this issue (Pastor Bob -- we may need to talk) .