paperink id: ads306 Halloween Decor Graphic Arts 1924 AD Atwater Kent Radio Amplifier Horn Speaker RADIO Advertising. ORIGINAL PERIOD Magazine Advertisement. AD measures approximately 6.5" x 10". You are purchasing a paper advertisement removed from a print publication and not the product shown in the AD. AD is in Good to Very Good Condition with tiny discolor mark top right (near letter R) as shown. Outstanding RADIO Ad to frame!