The following quote is from the book My Life and Work, by Henry Ford in collaboration with Samuel Crowther, published in 1922...
'Therefore in 1909 I announced one morning, without any previous warning, that in the future we were going to build only one model, that the model was going to be "Model T," and that the chassis would be exactly the same for all cars, and I remarked:
"Any customer can have a car painted any colour that he wants so long as it is black."
I cannot say that any one agreed with me. The selling people could not of course see the advantages that a single model would bring about in production.'
The text of this book is available here...
http://www.gutenberg.org/dirs/etext05/hnfrd10. txt