Emerson production numbers???

[71ford100]

I found a frame and front end for a Emerson 12-20 serial 24748. How many of these were produced and what year is this frame?

 

[Averyman]

I have serial #25435 which has casting dates of 1917 on the engine jugs which would make it around 1917 or 1918 but I'm guessing, as far as I know no records exist. The engine was the weak point so very few complete tractors survived.