Vintage Old Rca 7046 Antique Museum Photomultiplier Very Rare Wax Seals Intact

  

HERE IS WHAT I FOUND ON THE INTERNET. United States of America (USA). Fourteen-stage, head-on, flat-faceplate type having extended S-11 response.

Wavelength of maximum spectral response is 4200 +/- 500 angstroms. Has a five-inch diameter head, and makes use of silver-magnesium dynodes and a curved-circular, cesium-antimony semi-transparent photocathode. (May also be ordered with copper-beryllium dynodes).

Window material is ultraviolet transmitting glass Corning No. 133 x 282 x mm / 5.24 x 11.10 x inch. 850 g / 29.98 oz. Manufacturers Literature RCA Phototubes and Photocells PT-60.