1917 Corona Portable Folding Typewriter w/ Original Case, Excellent

Description

This belonged to a relative who died several years ago at 98 years.  It came from Algonac, Mich.  As noted in the 12 photo the last patent date was 1917.  It appears the typewriter is complete with no apparent missing parts.  If it has a new ribbon, it would be operational.  There is no damage to the keys or parts that I can observe. Note.  I know nothing about old typewriters.  Therefore, please ask questions and observe all photos.
Also, the case is complete, but has signs of age and usage. Nothing broken or missing.  Handle, latch, etc. are also good.  No musty case smell.  Weighs nine pounds.  Measures (case):  9 3/4 x 11 1/4 x 4 1/2 inches.
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