- Item type
- Object
- Makers
- Siemens Edison Swan Ltd
- Provenance
- Presented by the Marconi Corporation.
- Primary inscriptions
- "EDISWAN / RADIO VALVE" printed on front of carton surface.
- Other inscriptions
- "BVA [LOGO] / SIEMENS EDISON SWAN / LIMITED / 155 CHARING CROSS RD / LONDON W.C.2 / ENGLAND / AN A.E.I. COMPANY" printed on a side of carton exterior. "U301 / LIST PRICE / 17/6 / PLUS / PURCHASE TAX / RE-SALE PRICE / MAINTENANCE / This valve must be sold / retail at maker's list / price only. / MAZDA / MADE IN ENGLAND" printed on a side of carton exterior. "E / ATP4 / ZA5502" painted on exterior surface of bulb.
- Object type
- Radio valve
- Dimensions
- Diameter: 40mm Height: 110mm
- Inventory No
- 22414
- Accession Number
- 2004-9/256
Description
Ediswan Radio Valve (or Tube) Type ATP4, in red, black, white and black printed cardboard carton. Glass valve with single steel top cap, black plastic? base, nine steel base pins, and one central black plastic? base pin. Possibly one steel pin missing. With BVA (British Radio Valve Manufacturers Association) logo stamp on carton exterior.
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