Ponts-Moteurs
From Infogalactic: the planetary knowledge core
Ponts-Moteurs was the brand name of a French twin-cylinder 1081 cc power pack manufactured in Paris and sold from 1912 until 1913. It was meant to transform horse-drawn vehicles into motor vehicles "in a few hours, without modification".
References
David Burgess Wise, The New Illustrated Encyclopedia of Automobiles.
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