"Drawing Bicycle Mid - Automobile 1893 Royer And Morin System"
Interesting large drawing representing a bicycle equipped with an engine called "bicyclette mi automobile", date 1893 on the drawing and 1896 on the frame cartouche. I have not had the opportunity to do any research but I think that P. ROYER and A. MORIN are the inventors of this ancestor of the electric bicycle or the motorcycle. In-depth research would tell us more. In any case, it is an unpublished and rare document, worthy of a bicycle museum or the collection of an enthusiast. Two different views, from the side and from above. Original drawing, not an engraving. Dimensions with frame: 68cm by 55cm Dimensions of the sheet: 53cm by 41 cm. A few very small losses on the edge, slight folds otherwise very good condition. 
Le Magazine de PROANTIC
TRÉSORS Magazine
Rivista Artiquariato