WWII Bell Telephone Laboratories Portable Information Center Master Index ES-800515 Sweatshirts The spine label identifies the

The spine label identifies the binder as:

$500 payment on 10-18-25

with cover opened as shown

Original postally used example with writing and postmark

WWII Bell Telephone Laboratories Portable Information Center Master Index ES-800515 Sweatshirts The spine label identifies theOriginal 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