177 - According to Roger Tallon (1929–2011)

According to Roger Tallon (1929–2011) M400 spiral staircase, circa 1980. Made of cast aluminum and painted white, with 10 steps (9 steps + 1 large landing step) covered with a black, non-slip rubber tread and resting on a circular base Based on the model created in 1966 for Éditions Lacloche Height of the central shaft: 331 cm Height from floor to landing: approximately 210 cm