My 140 came from the dealer with a Danco C-4. These were billed as International Danco mowers. Danco is short for the Danuser Machine Company of Fulton, Mo. There was also the C-3 used on Cubs, here is the manual for that one:http://www.cleancomputes.com/Cub/Cub%20Implement%20Manuals/C-3%20Rotary%20Mower/C-3%20Rotary%20Mower.htm
I think they go back to the 50's anyway. Is this what you were after?