A typewriter without a keyboard?! Index typewriters such as the Hall don't have them. In fact, the Hall typewriter was the first industrially produced, practical to use index typewriter. Instead of the keyboard, one hand operates a pointer that selects a letter from an index while the other hand pushes a lever that moves the type to the paper. This method was designed as an affordable alternative to the more costly keyboard machines.
This particular model of the Hall typewriter was produced rough from the early 1880s through the late 1890s, only several years after the first keyboard typewriter. Over the course of its production, there were several other models produced. Notable examples include a Braille model for the blind and a 'portable' version that operates out of a sort of wooden briefcase. The average model cost about $40 at the time.