SERIAL NUMBERS
Oil Cooled and Hopper Cooled Engines
Farm Pump Engine
Model J
| 1904 101-300 | 1915 18000-19999* | 1925 93000-98999 |
| 1905 301-999 | 1915 50000-51999 | 1926 99000-99999** |
| 1906 1000-2099 | 1916 52000-54999 | 1926 160000-162999 |
| 1907 2100-4399 | 1917 55000-60999 | 1927 163000-166999 |
| 1908 4400-4899 | 1918 61000-65999 | 1928 167000-171999 |
| 1909 4900-5199 | 1919 66000-69999 | 1929 172000-176999 |
| 1910 5200-5499 | 1920 70000-74999 | 1930 177000-178999 |
| 1911 5500-5999 | 1921 75000-76999 | 1931 179000-180999 |
| 1912 6000-9999 | 1922 77000-79999 | 1932-1954 181000-unknown |
| 1913 10000-13999 | 1923 80000-86999 | * 20000-50000 were FPE |
| 1914 14000-17999 | 1924 87000-92999 | ** 100000-160000 were FPE |
Farm Pump Engine
| 1909 20000-20999 | 1921 113000-114999 |
| 1910 21000-23999 | 1922 115000-115999 |
| 1911 24000-27999 | 1923 116000-117999 |
| 1912 28000-31999 | 1924 118000-119299 |
| 1913 32000-37999 | 1925 119300-120699 |
| 1914 38000-45999 | 1926 120700-122399 |
| 1915 46000-50000 | 1927 122400-123099 |
| 1916 100000-101999 | 1928 123100-124499 |
| 1917 10200-103999 | 1929 124500-124999 |
| 1918 104000-106999 | 1930 125000-125399 |
| 1919 107000-109999 | 1931 125400-126397 |
| 1920 110000-112999 | 1932-1954 126400-unknown |
Model J
| 1921 to 1931 150001-150143 |
Radiator Cooled Engines
| Model AH, 1 cylinder, 6hp |
| 1929 410000-410283 |
| 1930 410284-410547 |
| 1931 410548-410581 |
| Model BC, 4 cylinder, 6-10hp |
| 1929 500000-500959 |
| 1930 500960-501610 |
| 1931 501611-501739 |
| Model AB, 2 cylinder, 6-8hp |
| 1925 400000-400115 |
| 1926 400116-400400 |
| 1927 400401-400600 |
| 1928 400601-401000 |
| 1929 401001-401500 |
| 1930 401501-401690 |
| Model BD, 4 cylinder, 6-10hp |
| 1930 600000-600031 |
| 1931 600032-600550 |
| Model BB, 2 cylinder, 3-5hp |
| 1930 450000-450118 |
| 1931 450119-450209 |
| Model BE, 4 cylinder |
| 1931 700000-700029 |
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