I can answer this. When ILL began production, Lucille Ball wanted Oscar-winning designer Elois Jenssen (who worked with Lucy before on a film) to do the show's wardobe. However, she was still under contract to another studio, so in the interim Ohrbach's was used for the show's clothing until Elois was able to join the show in 1953, and she stayed there until the final season in '56/57, when Desi Arnaz wouldn't give her a big raise. Her replacement was veteran RKO designer Edward Stevenson (best known for "Citizen Kane"), who stayed until the final season of The Lucy Show shortly before he died in 1968. And let's not forget that it wasn't until its final months that DS got a costume designer who was finally given the freedom to create her own desings (and let's face it, Mary McKinley's designs were brilliant- I can only guess what Ramse Mostoller could have done if only Dan Curtis had loosened the purse strings a bit....).
