As a matter of fact, Benach M1935 tank project was prior to Spanish Civil War.
It was designed on the first half of 1935 as a result of a commission (or the hope to be granted such) of the Turkish Government, taking advantage of the fact this country was already an established customer of their civilian tractors - also named Benach, after the factory owner surname.
(A Benach tractor preserved in Canary Islands)Engineer Benach had somehow been in touch with Walter Christie and was a follower of his innovative tank designs, so that he decided to apply Christie's concepts to his design - adding some improvements of his own, such as the automatic retracting of tracks above wheels when transitioning to on-road running; or the also automatic lifting of the central pair of wheels, so as to leave the AFV on 4 wheels.
(Preserved blueprints of Benach's Christie-like tank)The design was completed and patented in August 30, 1935 - but unfortunately no Turkish commission was granted to it. Apparently, Turkey decided better to acquire a large number of Russian T-26s. The innoivative Catalan design was also neglected by the Spanish Government, by that time committed to obtain an improved tank roughly based on FT-17 concept (known as Trubia A4).
When SCW finally outbroke, Benach factory was collectivized by CNT trade union and started building several improvised tanks on civilian tractors chassis (that we could properly name
'tracked tiznaos'!!) of doubtful efficacy, such as the one you can see below:
(Image from vehiculosblindadosdelaguerracivil.blogspot.com)After some months of confusion, an agreement between CNT and mr. Benach was reached, by which his factory remained collectivized but the engineer stood as its manager. It's perhaps after such that a new armour program was started, and the IGC Sadurní series of tanks, carriers and tractors (all of them already manufactured by us at 1:72) was born. This time however, no new attempt to introduce Christie's concepts was made, and the Sadurnís were given a quite more conventional T-26 style running gear.
(Minairons Miniatures IGC Sadurní tank at 1:72 scale)A fruitless effort once again. Sadurní AFVs were rejected too by the Spanish Ministry of War - only the tractor version was produced, even after the factory confiscation by the Spanish Goverment in May 1937.
Cheers,
Lluís