Vintage GE Show 'N Tell Viewer PictureSound ST 624 What Keeps the Earth in Orbit? (Earth in Space Vol I). For playing on GE Show 'n Tell Viewer. Record has been tested and plays. I have no way to test the film strip but it appears to be in good shape. Please see pictures. I have several of these GE Show 'N Tell Programs available for sale in my store. Please check them out. Thank you for your interest in my auction! If you have questions, please message me! I monitor my account on a daily basis. Thank you again!