Jeff,

It has been my experience that the third letter positioned directly under the S in the mark you mention is that of a G and not a C.

On authentic SHC marks that I have seen, of the type where there is a crown, then an SH on the next line, then a C on the next line, the C has always been positioned equidistant between the S and the H.

Based on the information you have shared in your latest post, and that given in your original post, my best judgment would be that your mark is actually an SHG mark, with the fourth mark beside the G being a number.

Best regards,

Mike