![]() ![]() Below this is a typo that states that “E” is the letter code for 1925, but this can be disregarded as it’s clear everywhere else that “H” is the year code for 1925. Then I centered my Chi and dove into the Corona 4’s.īMED 27 gives us the very first Corona 4 serial number, stating that it started in March of 1924 at serial number E200,001. Other than that and adding a few notes, I left the Corona 3 section largely alone, as it was fine as it was. The first job was to split out the Standard Folding from the Corona 3 in the TWDB and put a proper start to the Corona 3 in 1912. As Johnson put it “There are curently no widely known guidelines to differentiate a Zero and the Letter O, expert guidence welcome.” We’ll come back to that later. This is important because all later lists for Corona seem to have been distilled from versions of this list and I believe this caused a certain ambiguity about serial numbers past 1934. It is typed using a manifold-style all-caps machine which prints the capital letter “O” exactly the same as the number zero “0”. Starting with Berghagen 1953 (and 1962), which mirrors these exact numbers.
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