The first properly anthropomorphic design of ADS, built by the Carmagnolle brothers of Marseille, France in 1882, featured rolling convolute joints consisting of closely fitting concentric spherical sections sealed by watertight cloth membranes. The suit had 22 of these joints: four in each leg, six in each arm, and two in the torso. The helmet had 25 individual 2-inch (50 mm) glass viewports spaced at the average separation of the human eyes.[10] Weighing 830 pounds (380 kg), the Carmagnole ADS never worked properly and its joints never were entirely waterproof. It is now on display at the French National Navy Museum in Paris.[11]