HOW to get PHILCO INFORMATION
PHILCO SERVICE BULLETINS:
This and 2 more ways was how Philco got Schematics and Service Information to its RMS members.
The service bulletins were schematics for each model radio.  Sometimes they had other information.  For example bulletin #289 was for Bakelite Capacitors.  Rider used these for their manuals, but PHILCO was a pretty good company and when they had a problem they tried to rectify the problem right away so there may be more than 1 bulletin for a radio.  For example Model 60, the first bulletin was number 164 the second bulletin was number 164A.   Rider did not always publish the second bulletin.  

PHILCO CHANGES IN MODELS:
This was another way Philco let its members know that they had changed something in their production.  They sometimes changed their production runs as many as 5 times, so you may have one change in run 2 and another in run 3 and run 4 may have changed it back to run 2, as in Model 60.
PHILCO SERVICEMAN:
This was published by PHILCO as a little newspaper, with editorials and discussions about the changes they had made in production and any new products.  Sometimes there were discussions on why they did things one way and not another such as in their September 1935 article on why they did not use metal tubes.

All this seems confusing to present day restoration people, but this was no problem for Philco Repairmen who belonged to RMS.  They just used the Philco schematic and checked the PHILCO CHANGES IN MODELS for any changes in the set.
Not all schematics were written the same.  PHILCO’S own schematics were written the same, while others were NOT.  YOU MUST be careful, for example resister ohms, one may say 500,000 ohms and one may say .5 Meg.  They both mean the same.  If you don’t understand ASK someone.
Below is an article written in September 1935, and copied from a
PHILCO SERVICEMAN.