Selector or Multiposition Switch - Master or control switch (cam-operated contact assembly), 6-circuit 3-point reversing switch
(in English) (1993)  315-1975 - IEEE Standard American National Standard Canadian Standard Graphic Symbols for Electrical and Electronics Diagrams (Including Reference Designation Letters), IEEE, p. 66  DOI:  10.1109/IEEESTD.1993.93397. ISBN:  0738109479.
Michel Bakni