While the watches based on the original Cadman watch are all https://forum.igbji.org/fragen/index.php/user/pancraziongalipn called American 1921, there is actually one earlier version of this design in Vacheron's archives, https://leventabaci.onlinedoktorasor.com/?qa=user/theodosiareatonr which was completed in 1919. That model has a dial with radium-painted Arabics, and instead of having the crown to the left, it's located at the upper right, with the dial https://www.conexion.scalando.edu.co/empleador/xavierg2002/ rotated to the right as well.