To answer some of your questions the Deering New Ideal Mowers were built in these models and the years built.
New Ideal plain lift, 1905-1912
New Ideal Vertical Lift 1905-1912
New Ideal Giant, 1906-1912
New Ideal "B", 1905-1918
New Ideal "B", Giant, 1909-1918
New Ideal "B", One-Horse, 1910-1922
New Ideal Two-Horse Reverse Gear "BD",1917-1926
The parts book has over 35 pages on the New Ideal mowers. And it is
Mo. 29-HM Hay machines repairs catalog. I do not know year it was put out.
The book covers the McCormick No. 4, Big 4, No. 6, Big 6, No. 7 mowers but it stops with the No. 7 being the second last horse drawn mower McCormick last being made without checking a different book think 1938 with the last model the No. 9 starting in 1939. I am not finding part numbers like you have down. Just about every number has a letter or 2 in front of it.
New Ideal plain lift, 1905-1912
New Ideal Vertical Lift 1905-1912
New Ideal Giant, 1906-1912
New Ideal "B", 1905-1918
New Ideal "B", Giant, 1909-1918
New Ideal "B", One-Horse, 1910-1922
New Ideal Two-Horse Reverse Gear "BD",1917-1926
The parts book has over 35 pages on the New Ideal mowers. And it is
Mo. 29-HM Hay machines repairs catalog. I do not know year it was put out.
The book covers the McCormick No. 4, Big 4, No. 6, Big 6, No. 7 mowers but it stops with the No. 7 being the second last horse drawn mower McCormick last being made without checking a different book think 1938 with the last model the No. 9 starting in 1939. I am not finding part numbers like you have down. Just about every number has a letter or 2 in front of it.