Part 4 is in session and here are the commercial breaks that aired on CBS during "Guiding Light".
00:07 - Break #1
02:54 - Break #2
05:03 - Break #3
08:36 - Break #4
10:44 - Break #5
13:22 - Break #6
15:31 - Break #7
P.S., Everything belongs to their original copyright holders. I do not own anything. So no copyright infringement intended what so ever.