Well Ben, I can't say for sure. O & H did a handful of episodes center around fishing.
GOOGLE Images says it from 1959.
For all I know it could be an ad for a repeat episode on a local station somewhere.
Wish I could be more helpful.
I believe the man sitting is John Brown who voiced "Thorny" on the radio series.
Since it is almost Halloween, The Haunted House episode from the radio show.