https://www.reddit.com/r/typewriters/comments/1kbp3bb/corona_3_with_case_key/
Corona 3 cases had very straightforward keys with a simple 1-2mm numb at the far end.
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- Apr 2025
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The company used to offer an optional dummy key that attached to the right side of the frame to rest your right pinky. They are hard to find nowdays. You could carve a small wood block to slip over the frame where it can provide a comfortable rest.
quote via the reliable u/ahelper
https://old.reddit.com/r/typewriters/comments/1jvgm5z/feed_pawl_not_engaging_ratchet/
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