From the original receipt found with my church-bazaar find, a late-model Olivetti 32. Purchased for $99.50 in October 1975 (not including sales tax.) An online inflation calculator makes this $420.20 in 2011 dollars, or about the cost of a budget laptop. 2247 Market in San Francisco is currently Lime Restaurant.
Adhered to the front of a Smith-Corona Sterling, this fine badge from Key Typewriter in Sunnyvale, down in the heart of Silicon Valley. No search engine matches for this business, but the telephone number uses a three-digit exchange, which probably dates it from at least the 1960s.
This is inside the case lid of the same Sterling. Presumably when Key went the way of the buggy-whip, Century Business stepped in and got the previous owner's, um, business. Century is still around.
My favorite one by far, stuck to the side of my big Royal standard machine. I'm not sure if Berkeley Office Equipment morphed into Berkeley Typewriter or California Typewriter, or was a third business entirely. With a major University just down the street, there would have been a demand for administrative machines and student machines alike.