The above is a crop of a somewhat famous photograph taken by Beaumont Newhall of the L.C. Smith & Corona typewriter used by Charis Wilson Weston to write the book "California and the West." I'd love to find a typewriter like this one.

Note the carriage return lever is on the left, the seven keys above the standard four rows of keys, and the key tops themselves - they appear to be plastic rather than glass. Has anyone seen a typewriter like this one?