LeBlond Regal Lathes (13" to 19") early-1940s to the late 1950s. These were designated: A = 10", B = 13", C = 15", D = 17" E = 19", F = 21", H = 24". The lathes remained largely unchanged mechanically from their introduction until the late 1950s - although the stands and drive systems were modernized to make the machines more compact.