|
|
|
| SERIAL
| DATE
|
|---|
|
| MODEL
| FROM
| TO
| FROM
| TO
|
|---|
| Capital shift on left, figure shift on right
| Standard
| No. 1
| 1
| 5,570
| 1906
| July 1910
|
| Capital and figure shifts on left side
| Standard
| No. 2
| 5,571
| (19,999)
| July 1910
| Feb. 1912
|
| With pivot bearing type bars, began
| Corona
| No. 3
| 20,000
| 26,299
| Feb. 1912
| (Dec. 1912)
|
|
| Corona
| No. 3
| 26,300
| 33,000
| Jan. 1913
| Aug. 1913
|
| With ball bearing type bars, began
| Corona
| No. 3
| 33,001
| 38,299
| Aug. 1913
| Dec. 1913
|
|
| Corona
| No. 3
| 38,300
| 50,233
| Jan. 1914
| Dec. 1914
|
| With solid segment, began
| Corona
| No. 3
| 50,234
| 70,000
| Jan. 1915
| Dec. 1915
|
| Improved Model, began
| Corona
| No. 3
| 70,000
| 72,950
| Dec. 1915
| Dec. 1915
|
| With solid segment, began
| Corona
| No. 3
| 72,951
| 99,999
| Jan. 1916
| Dec. 1916
|
|
| Corona
| No. 3
| 100,000
| 119,999
| Jan. 1917
| July 1917
|
| With new ribbon feed, began
| Corona
| No. 3
| 120,000
| 138,999
| July 1917
| Dec. 1917
|
|
| Corona
| No. 3
| 139,000
| 193,999
| Jan. 1918
| Dec. 1918
|
|
| Corona
| No. 3
| 194,000
| 247,999
| Jan. 1919
| late 1919
|
| Light-folding arm, adopted
| Corona
| No. 3
| 247,000
| 274,999
| late 1919
| Dec. 1919
|
|
| Corona
| No. 3
| 275,000
| 295,999
| Jan. 1920
| early 1920
|
| Origional folding arm re-adopted
| Corona
| No. 3
| 295,000
| 365,999
| early 1920
| Dec. 1920
|
|
| Corona
| No. 3
| 366,000
| 436,999
| Jan. 1921
| Dec. 1921
|
|
| Corona
| No. 3
| 437,000
| 500,000
| Jan. 1922
| Oct. 1922
|
| Improved Model 3
| Corona
| No. 3
| 500,001
| 518,199
| Oct. 1922
| Dec. 1922
|
|
| Corona
| No. 3
| 518,200
| 585,140
| Jan. 1923
| Dec. 1923
|
|
| Corona
| No. 3
| 585,141
| 607,151
| Jan. 1924
| Dec. 1924
|
| Four-bank model, began
| Corona
| Four
| E200,001
|
| Mar. 1924
|
|
|
| Corona
| No. 3
| 607,152
| 609,988
| Jan. 1925
| Dec. 1925
|
| Four-bank model
| Corona
| Four
| H-100,001
|
| Jan. 1925
|
|
|
| Corona
| No. 3
| 609,989
| 611,988
| Jan. 1926
| Dec. 1926
|
| Four-bank model
| Corona
| Four
| 1K-00,001
|
| Jan. 1926
|
|
|
New method of numbering Corona Fours began;
See 'METHOD OF NUMBERING OF CORONA FOURS' below
|
| 3, Special, and Plus
| Corona
| 3
| 611,989
| 613,245
or 613,354
| Jan. 1927
| Dec. 1927
|
| 3, Special, and Plus
| Corona
| 3
| 613,246
or 613,355
| 619,198
| Jan. 1928
| Dec. 1928
|
| 3, Special, and Plus
| Corona
| 3
| 619,199
| 641,817
| Jan. 1929
| Dec. 1929
|
| 3, Special, and Plus
| Corona
| 3
| 641,818
| 656,286
| Jan. 1930
| Dec. 1930
|
| 3, Special, and Plus
| Corona
| 3
| 656,287
| 660,546
| Jan. 1931
| Dec. 1931
|
| 3, Special, and Plus
| Corona
| 3
| 660,547
| 663,163
| Jan. 1932
| Dec. 1932
|
| 3, Special, and Plus
| Corona
| 3
| 663,164
| 667,257
| Jan. 1933
| Dec. 1933
|
| 3, Special, and Plus
| Corona
| 3
| 667,258
| 679,229
| Jan. 1934
| Dec. 1934
|
| 3, Special, and Plus
| Corona
| 3
| 679,230
| 687,104
| Jan. 1935
| Dec. 1935
|
| 'Standard' 'Clipper' introduced
| Corona
| Standard
| ? 1C 000,001 ?
|
| 1935
|
|
| 3, Special, and Plus
| Corona
| 3
| 687,105
| 688,370
| Jan. 1936
| Dec. 1936
|
| 3, Special, and Plus
| Corona
| 3
| 688,371
| 692,809
| Jan. 1937
| Dec. 1937
|
| 3, Special, and Plus
| Corona
| 3
| 692,810
| 696,309
| Jan. 1938
| Dec. 1938
|
| Standard model
| Corona
| Standard
| 2C 135,001
|
| 1938
|
|
| 3, Special, and Plus
| Corona
| 3
| 696,310
| 700,056
| Jan. 1939
| Dec. 1939
|
| Standard model
| Corona
| Standard
| 2C 198,001
|
| 1939
|
|
| 3, Special, and Plus
| Corona
| 3
| 700,057
| 700,091
| Jan. 1940
| Dec. 1940
|
| 3, Special, and Plus
| Corona
| 3
| 700,092
| 700,354
| Jan. 1941
| Dec. 1941
|
Method of Numbering of Corona Fours
Each year a new letter is used to prefix the serial number:
| E - 1924
| H - 1925
| K - 1926
| L - 1927
|
| M - 1928
| P - 1929
| A - 1930
| B - 1931
|
| B & C - 1932
| C & D - 1933
| EO - 1934
| HO - 1935
|
| KO - 1936
| LO - 1937
| LxM - 1938
| LxP - 1939
|
| LxA - 1940
| LxA - 1941
|
Serials are repeated each two months of each year, comensing with 00,001. This system apparently began in 1926. This scheme was modified starting in 1934 when CORONA added another character to the year designation and subtracted a didget from the number. There are curently no widely known guidelines to differentiate a Zero and the Letter O, expert guidence welcome. The lower case x is standing in for the month codes listed below.
The number before the letter denotes the month:
| 1 - Jan. and Feb.
| 4 - July and Aug.
|
| 2 - Mar. and Apr.
| 5 - Sept and Oct.
|
| 3 - May and June
| 6 - Nov. and Dec.
|
Example 1: 3H-03,267 - machine 3,267 of series manufactured in May or June 1925.
Example 2: L5P-00,698 - machine 698 of series manufactured in September or October 1939.
The dash and the comma are not present with serial number on machine. For those machine with a leading character — except for 'L' (unless the machine is Lavender in color) —, that leading character related to the finish of the machine. Go to the DuPont Duco® Finishes link in the Corona Index below.
