McCormick-Deering 10-20
10-20 Gear Drive Serial Numbers
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Production Year
Beginning Serial Number
1923
501
1924
7641
1925
18869
1926
37728
1927
62824
1928
89470
1929
119823 (and 159651 - 159796)
1930
159111 (except 159651 - 159796)
1931
191486 (and 201801 - 203174)
1932
201013 (except 201801 - 203174)
1933
None built
1934
204239
1935
206179
1936
207275
1937
210235
1938
212425
1939
214886