Gros ouvrage du Four à Chaux: block 2 was equipped with a retractable turret with two 75 mm model 1932 (shortened). Some guides in the work say that this model with its shorter range was choosen as the guns weren't allowed to fire into Germany. This is total nonsense. The shorter-barrelled model 1932 had a more curved trajectory that was needed in this region with steep valleys.