Another point for Fëdor!
This is the first Deckert to appear in Autopuzzles. There were so many obscure pre-war French marques that even after all these years it's possible to find one that had not previously been on this forum!
Here are the notes from when it was auctioned by Bonhams in 2011:
"Henri Deckert worked in France's burgeoning motor industry in the early 1900s, operating from prestigious showrooms and offices in Boulevard Haussmann in Paris with his construction and repair works at Levallois-Perret, the heart of the French motor manufacturing industry. Production, which commenced in 1901, included cars, motorcycles and bicycles and his contemporary sales literature refers to his own-designed 'improvements' to the most reliable engines of the time, Aster and De Dion Bouton. Like so many of his contemporaries Deckert promoted his products in motor sport, taking part, alas without distinction, in the Circuit du Nord and the Circuit des Ardennes races.
This 1902 8hp car is powered by a single cylinder, 864cc engine of De Dion design but Deckert manufacture, using a De Dion Bouton cylinder head. The engine is water-cooled, with side-mounted radiator panels in the style of the contemporary Renaults. The engine is mounted in a tubular chassis and drives through a single plate clutch, via a three forward speed and reverse gearbox and chains to the rear wheels. Remarkably this car has much of the horse carriage about it, with rear wheels significantly larger than the front wheels, narrower front track and the front springs are full elliptic while the C-type rear springs, supplied by a French horse carriage spring maker, support only the rear body, the back axle being unsprung. The vendor reports that this suspension design, with front and back halves of the body hinged, provides a most comfortable ride. The Aurore bonnet badge was Deckert's marque déposée, the wheel depicting the rising sun and the bluebird heralding the dawn of the motor car. Deckert's bicycles and motorcycles were marketed under the name Aurore.
This rarest of French motor cars, believed to be the only survivor of the marque known, has been in the present enthusiast ownership for many years and was restored in 1994. Since then it has regularly and successfully taken part in the London to Brighton Veteran Car Run as well as many events in the UK for VCC members and has frequently ventured abroad to appropriate events. The coachwork is very smartly presented in blue livery with deep-buttoned, red leather upholstery and is equipped with brass fittings including oil side lamps and a bulb horn. It sits on varnished wooden wheels with beaded edge pneumatic tyres."
And below is the unedited puzzle picture.