Telefunken Operette 8 tube radio restoration - Part 1. First look and transformer tests. - YouTube
Telefunken Operette 8 - YouTube
West Auctions - Auction: Part 1: Surplus Audio, Lighting Equipment and Supplies from Bay Area Trade Show Company ITEM: Tube Radio Telefunken Operette 6 - German Approx 1955/56
Telefunken Operette 7 | Antique radio, Radio design, Old radios