In 1934, Citroën introduced the P17 halftrack, which was developed using the Kégresse patent. This patent used a flexible rubber band instead of interlocking metal parts to form a track. But before production could begin, the company went bankrupt and the design together with the patent were sold to Unic automobile company. Unic then put it into production under the designation P107.
The Unic P107 was a half-track artillery tractor, designed to tow artillery and transport troops. It was powered by a Delahaye 4-cylinder, 70 hp petrol engine, allowing a top speed of 45 km/h (28 mph) and a range of 200 km (124 mi). It featured a fully tracked rear suspension, giving it excellent off-road mobility. During World War Two the P107 was used by the French Army for towing 75 mm and 105 mm artillery pieces and after France surrendered, captured P107’s were repurposed by German forces as the Leichter Zugkraftwagen U304(f) for towing or converted into self-propelled weapons.
This Unic P107 Bu Halftrack is on display in the Musée des Blindes in Saumur, France.
is that a secondary fuel tank on the front bumper area or something else? Where are the fuel tank(s)?
It is a roller to push the vehicle up on uneven terrain, the normal bumper would dig itself into the earth but the roller pushes it up. We have not been able to see where the fuel tank is located, we expect it to be somewhere in the chassis.