Vintage / Antique 1933 Grunow 520 Radio Model 5 B Fully Restored and Working. Here we have a Vintage / Antique 1933 Grunow 520 Radio Model 5 B Fully Restored and Working. The spool of wire on the top of the radio was used as antennae wire. The piece measures approx. 12″ Wide, 8″ Tall, and 6 Deep. Please see photos for more detail as they are part of the description. Thank you for looking! Please see our other listings for more great finds!