The man on the left is Don Mitchell of Locke Advertising (later Advertising Inc.).
The man on the right is Fillmore Bowen, Advertising Director for OTASCO.

Another brain-flash in the middle of the night makes me think the name of the horse puppet was "Horse Radish."

(from Guestbook 151) Rick Brashear said:

...there is a dog puppet holding a card that says, "OTASCO". The puppet's name was Parcel Post. It was a kiddie show, I believe Big Bill & Oom-A-Gog, which I was on sometime around 1960.

Webmaster, 6/11/2006: I see that Millard Fillmore Bowen, Jr. passed away two days ago. Our condolences to his family.