1908 Smith Premier No. 10

This typewriter is a Smith Premier Visable Type machine introduced in 1908.  Notic the black and white keys, one keyboard (black) is for capitals, the lower keyboard (white) is for lower-case.  Oddly enough, the idea of having a shift key was introduced in a machine made by another company in 1868!  Why Smith Premier continued to use a dual-keyboard system is a mystery to me.