# 1500 (1973) Marconi - Mr. Zip, BK/4, UL, MNH
Regular price
$0.35
Sale
US 1973
MARCONI SPARK COIL
Electronics Progress Issue
The spark coil formed the heart of the earliest radio transmitters.
Water Activated Gum
Scott 1500
Perforated 11
Upper Left Stamp Mr. Zip Block of 4
Water Activated Gum
Scott 1500
Perforated 11
Upper Left Stamp Mr. Zip Block of 4
Mint Never Hinged