Where am I? #2

Trolleybus TBS12 on route 108 along Nithsdale Road passes the Salisbury Quadrant and the Strathbungo Drinking Fountain on 8th August 1963. (Image: Charles Billette, reproduced with permission.) The photo was discovered as part of an investigation into the mysterious long lost drinking fountain, and this is the only known image to show it in any detail. The McGills service 121 passes the same spot on 3rd May 2020. From electric to diesel in sixty years; that’s progress.