T.S.F.: Edison-effekten i en elektrisk pære bruges til at detektere TSF-signaler. Anonym illustration fra 1925. Privat samling.(The T.S.F.: Edison effect in an electric bulb uses to detect TSF signals. Anonymous illustration from 1925. Private collection.)Anonymous Anonymous |
| € 133.36
Inklusive 25% moms |
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1925 · Engraving
· Billed-ID: 918305
Private Collection / Bridgeman Images |
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