IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This prototype receiver was made by ...
Marked: "Model 100-A / RCA Loudspeaker / Serial No. 202856 BG / [License Notice] / Patents: 127527; 1271529; 1365898; 1631646. NP 37601." This device is a cone type permanent magnet loud speaker. A ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results