Collectorium · Postage stamp

Progress in Electronics – Marconi spark coil and gap

DESCRIPTION OF THE ITEM United States of America, 1973 Early wireless equipment: the spark coil and the sparkling gap of Guglielmo Marconi. Catalog identification: Scott 1500. Nominal: 6 cents; colour: gray, violet, ocher and multicolor. Unskilled specimen; the condition of the glue has not been checked. CATALOGUE IDENTIFICATION AND PROBABLE VARIANT Working identification: Scott 1500. Most likely attribution: Scott 1500. Confidence: high. Possible alternatives: Check the back and original glue.

Category

Postage stamp

Year / period

1973

Country

United States of America

Denomination

6 cents

Material

Paper

Collectorium

№ ST-1106