Marconi-Osram Radio Valve Type DET 1A, by Marconi Company, London, 20th Century | |
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| Inventory Number: | 64933 |
| Object Type: | |
| Place Created: | London United Kingdom (England) Europe |
| Accession Number: | 2004-9/475 |
| Brief Description: | Marconi-Osram Radio Valve (or Tube) Type DET 1A, with large glass balloon envelope. Unusual form of base: square red composition base with brass? base pins at four corners. With vertically-mounted nickel-plated anode and interior filament. Previously catalogued with Siemens & Haske Radio Valve Type RE87 (Inv. Num. 69068), GPO Radio Valve Type No 2 (Inv. Num. 26614). |
| Primary Inscriptions: | "MARCONI OSRAM VALVE / MADE AT THE OSRAM LAMP WORKS / COVERED BY VARIOUS PATENTS / MADE IN ENGLAND / Y" printed on the exterior surface of bulb. "DET1A / 22" printed on the exterior surface of the bulb. |
| Provenance: | Presented by the Marconi Corporation. |
| Collection Group: | Marconi Collection |
| Material(s): |
Glass nickel-plated brass plastic? assorted metals. |
Narratives | |
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