UNITED STATES-1973 ELECTRONICS PROGRESS ISSUE -COMPLETE - MINT P# SET OF 4! Pictured: Marconi's Spark Coil & Gap, Transistors and Printed Circuit Board, Microphone, Speaker, Vacuum Tube, TV Camera, De Forest Audions Complete - Postage and Airmail SC# 1500 - 1502, C86 (With P#'s)CONDITION:Excellent.Mint, Never-Hinged LOW Buy It NowPrice! Low Shipping! No looking! Shipped Securely! Check out my other items! Be sure to add me to your favorites list! 900909-xxPowered by eCRATER . List your items fast and easy and manage your active items.