Norris Cam Stamping Question

This is not for a Mopar but I have an old Norris cam in good shape but can't quite decipher all the stampings..... Pix attached. The question is about the 'SH' designation. From what I have been able to find about the Norris cam world, 'S' for solids and 'H' is for hydraulics. So is 'SH' for either? Tnx