Ta da! It was filthy dirty, and the case was beyond salvageable, but it's aqua! With touches of red. *Swoon!*
My favorite part is the the "Royal" logo; pushing it triggers the lid to pop open.
I haven't extensively researched it yet, but I believe it to be a "Royal Quiet Deluxe", manufactured in six colors (and gray) from 1955 to 1957. The first generation was produced from 1939 until 1948, and was the typewriter of choice for Ernest Hemingway. Later, Royal produced a special edition with gold plated accents which was famously used by Ian Fleming to write Casino Royale.
Here is mine, cleaned up and ready to party.
There is one listed on Etsy in pristine condition for over $500 -- I think I got a good score!