Despite these problems Vliegtuig Industrie Holland (VIH), in English Aircraft Industry Holland, took an interest in what had become known as the "flying bicycle" and funded Carley, who had set up Carley's Aeroplanes Co. for the purpose, to fit an Anzani inverted Y-type air-cooled engine which produced about 15 kW (20 hp), mounted in the nose on a steel ring and driving a two blade propeller.

They also produced a developed version called the Holland H.2, engineered by Theo Slot, one of the original designers, with H. Van der Kwast, Carley's Aeroplanes' old manager.

[4] On 18 December 1923, not long after the C.12a's first flight with the Anzani engine in October, the Belgian pilot Raparlier flew it from Waalhaven, Rotterdam to Le Bourget, Paris via Brussels.

The whole flight took just under six hours, despite a one-hour stop in Brussels and a head wind on the second leg, slowing him down and forcing him to land near Le Bourget for extra fuel.

[1][5][6] After an attempt to compete with both the C.12a and the H.2, following the latter's successful first flight on 11 July, in the eight leg Tour de France des Avionettes was foiled by arguments over rules, the latter went for testing with the Marine-Luchtvaartdienst (MLD) but no sales resulted.

Of six more civilian examples two were lost on test or delivery flights, two more were sold in France and Spain, one went to the Dutch East Indies and the other was used for a time by a flying instructor in the Netherlands.