By the end of the decade Buchet was one of a number of automakers to find itself competed out of business by France's by now increasingly dominant larger auto-makers.
During the early part of the war, between 1914 and 1915, Buchet were delivering chassis to the Hollingdrake Automobile Company in Stockport, England.
[2] Hollingdrake mounted their own bodies - mostly open two-seaters and coupés - and sold the Anglo-French car branded as the Ascot, priced at 195 British pounds.
[2] At the 15th Paris Motor Show in October 1919 Buchet were exhibiting a 1,456 cc (8CV/HP) engined car.
[1] After the relocation, in 1919, to premises in Billancourt, Buchet remained largely faithful to their by now tried and trusted methods, and as the 1920s progressed they came to be seen as somewhat conservative.
[6] It was also used as the chassis for Ernest Archdeacon's experimental 'propeller driven motorcycle', the Aéromotocyclette Anzani of 1906.
Monsieur Marcellin finished the 337 kilometre event in 5 hours 47 minutes 14 seconds and was the first motor cycle home, and third overall.