Gray Television has applied to move WSHM-LD from Springfield to Boston. The station currently calls itself CBS 3. I'm guessing if the move is approved, CBS 3 will be on a WGGB 40 sub-channel. Until the mid or late 90s, sister station WFSB-3 in Hartford was the Springfield CBS affiliate.
Link to application includes a PDF file - https://enterpriseefiling.fcc.gov/dataentry/public/tv/draftCopy.html?displayType=html&appKey=25076f919b26da64019b2e1144e127e6&id=25076f919b26da64019b2e1144e127e6&goBack=N
Link to application includes a PDF file - https://enterpriseefiling.fcc.gov/dataentry/public/tv/draftCopy.html?displayType=html&appKey=25076f919b26da64019b2e1144e127e6&id=25076f919b26da64019b2e1144e127e6&goBack=N