E-auction 681-725068 - fme_1109822 - THE 100 GREATEST INVENTIONS OF HUMANITY Médaille, Invention du tube amplificateur

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Proof set

Estimate :	40 €
Price :	21 €
Maximum bid :	21 €
End of the sale :	04 May 2026 20:17:00
bidders :	6 bidders

Type : Médaille, Invention du tube amplificateur

Date: 1979

Metal : silver

Millesimal fineness : 800 ‰

Diameter : 31,5 mm

Orientation dies : 12 h.

Weight : 13,59 g.

Edge : lisse + C + 79 + P + poinçon L (flamme) M + charançon

Puncheon : Charançon

Coments on the condition:

Traces de manipulation

Obverse

Obverse legend : À L’EXERGUE : LE TUBE / AMPLIFICATEUR.

Obverse description : Représentation de l’invention .

Reverse

Reverse legend : L’INVENTION DE LEE DE FOREST / ET ROBERT VON LIEBEN A PERMIS / DE CONCRETISER L’IDEE DE / L’AMPLIFICATION DES / OSCILLATIONS ELECTRIQUES / DE N’IMPORTE QUELLE / FREQUENCE.

Reverse description : Légende en 7 lignes dans un cercle, sous une chouette aux ailes déployées et une demi roue crantée.