Here is a nice mailer from American-Standard Heating and Plumbing with lots of information about their radiators and convectors from 1946.
Thanks to Kirby Slear for scanning and sharing. He notes, "You will notice the name of the individual who sold these, Harvey Mull, plumbing and heating, in RD#1 Selinsgrove. That is about 50 miles north of Harrisburg on the Susquehanna river. Harvey is the man my parents bought the house from I grew up in. That house had a nice baseboard hot water heating system."
The Improved Webster Type "R" System of Steam Heating is a service bulletin from Warren Webster and Company (The Pioneers of Vacuum Steam Heating), established in 1888.
This manual was created by O-E Specialty Manufacturing Co. and outlines how to install the "O-E" Perfect System, which is a Vapor Vacuum heating system.
Here is the original Installation and Operating Instructions and Parts List for The H.B. Smith Company's Oil Fired Cast Iron Hot Water Boilers (No. OHB-13W). This is esti...