# 1502 (1973) Transistors / Circuit Board - Mr. Zip, BK/4, UL, MNH
Regular price
$0.75
Sale
US 1973
VACUUM TUBE and TV CAMERA TUBE
Electronics Progress Issue
The simplest vacuum tube, the diode, was invented in 1904 by John Ambrose Fleming.
Water Activated Gum
Scott 1502
Perforated 11
Upper Left Stamp Mr. Zip Block of 4
Water Activated Gum
Scott 1502
Perforated 11
Upper Left Stamp Mr. Zip Block of 4
Mint Never Hinged