Good afternoon all ...... I've posted the attached "pdf" document on some of the other telephone lists as well. It pertains to several of the N.E. common battery walnut wall sets that were made beginning in the 1920's. I've grouped them according to the C/B service they provided, and the common walnut box that they shared. The sets listed are the N.E. N1293-A Side Tone Manual Service / N1293-GP Side Tone Dial Service / N1293-GY / Common Battery Signaling & Local Battery Talk Circuit / N1393-BA Anti Side Tone Manual Service - *The N1393-BA Has a Dial Opening and can be upgraded to dial service at any time.
The schematic drawing for the N1293-GP is difficult to find, and the drawing for the N1293-GY is almost impossible to find.
Enjoy the rest of the day.
Jeff Lamb