RACINE, Wis., April 30, 2015 /PRNewswire/ -- SC Johnson unveils Frank Lloyd Wright's incredibly rare Wasmuth Portfolio to mark the start of its 2015 architecture tour season. The iconic lithograph design Portfolio launched Wright into the international spotlight and paved the way for the modern architectural movement. SC Johnson has also expanded its weekend public tour offerings to offer a rare glimpse at the newly revamped 1940's penthouse office of third-generation company leader, H.F. Johnson Jr.