The Laffly S-35T was designed as a 6x6 heavy artillery tractor for towing guns in the 10 ton class such as the 155mm L mle 1918 Schneider, 155mm mle GPFT and 155mm mle GPF heavy field guns as well as the 220mm mle 1916 siege mortar. It was powered by a 6.3litre 4 cylinder engine capable of 100HP and could carry a payload of 1.2tons. The S-35T was also fitted with a winch allowing it to be used as a recovery vehicle. 225 S-35T were produced between 1937 to June 1940. Kit is cast in white metal.