Blickensderfer 6' typewriter, c. 1906, George C. Blickensderfer; Manufacturer: Blickensderfer Manufacturing Company, American, 1850-1917, 5 x 12 x 8 1/2in. (12.7 x 30.5 x 21.6cm), Aluminum, other metals, United States, 19th century, The Blickensderfer model 6 was the the portable typewriter 2.0--an improvement over the Model 5 that had debuted at the Chicago World's Fair in 1893. The Model 6 was made of aluminum, rendering it lightweight, and like its predecessor, contained a fraction of the parts that made up its desktop contemporaries. Its rotating type wheel allowed for a speedy change in typefaces. Dubbed the 'Five-Pound Private Secretary,' the Model 6 was portable and durable; the company touted it in advertisements as being, 'in every way, a high class machine.' Like our own laptop computers and tablets today, it helped revolutionize work and communication while on the go.