In the comments below, Brian Fletcher referenced that this radio tower was used by WSSB beginning on Leap Day, 1948. You can see these call letters on the 1951 USGS topoquad. The tower is circled. Also notice that Beverly Drive in Forest Hills does not yet exist, although a structure (likely a farm house) is shown on the hillside.
The radio tower was accessed from Summit Street to the west. That access road is gone, replaced by the subdivided lots of the Forest Hills neighborhood. Here's a close-up of the area with contemporary parcel boundaries (and street names) overlaying a 1940 aerial photograph. The radio tower is circled in yellow.