WWII Bell Telephone Laboratories Portable Information Center Master Index ES-800515 Sweatshirts with cover opened as shown

with cover opened as shown

factory-style for excellent control under recoil)

Original postally used example with writing and postmark

Type CRR-50061

WWII Bell Telephone Laboratories Portable Information Center Master Index ES-800515 Sweatshirts with cover opened as shownOriginal Bell Telephone Laboratories, Inc. Portable Information Center Master Index, publication ES 800515, housed in its original black binder. The spine label identifies the binder as: ES 800511 7 Intercept Frequency Circuits, Wiring Diagrams, Cross Connections & Maintenance Information The master index describes a multi folder portable communications system containing technical documentation for telephone facilities, terminal radio frames, PBX