Doc Potts (unsold Synchro-Vox pilot, 1960)

Doc Potts would have been the second Synchro-Vox animated series were it produced. Synchro-Vox was the "technique" invented by Cambria Productions originally demonstrated by Clutch Cargo the previous year. It's incredibly limited animation that forgoes track reading for dialogue in favor of just filming a the voice actors talking and cutting and pasting their mouths on still frames of the characters. In 1960, a test film called Doc Potts (or sometimes cited as Doc Potts and Weselly) was produced using the same method. Clark Haas described Doc Potts as a "lovable old veterinarian, a sort of combination Charley Weaver and Charlie Ruggles," and Weselly as "an eager Boy Ranger, a young innocent who finds all the answers in his Boy Ranger official manual and who contrasts sharply with (Clutch Cargo's) Spinner's relative worldliness."

All I can find of this show is this cel:
vegalleries.com/sites/default/files/art/product_images/manual/2017/febdocpotts9479.jpg

Even one of Cambria's other unsold pilots, one of two Moon Mullins pilots, is available.