In this issue

• The 1AP5, Offspring of the 913 (“sort of”)
• Philco and the PenDD61
• Standard Electric Argentina
• Results – Boyer Estate Auction
• Type Codes – Varien Tubes
• Date Code for Bell Labs Tubes
• Marathon Tubess and Their Telegraphic Codes
• “The Tube Collector” (Radio News)
• A Look at Hitachi Receiving Tubes
• The 2E27 – An Existence Proof?