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."
This document contains the manufacturer's instructions for the HB Smith Series M450L Mills Water-Tube Boiler for automatic firing with oil or gas (Steam, Vapor, or Water ...
This document contains the jacket assembly instructions for the HB Smith Series 45 Mills Boiler (circa 1979).
This document contains the combustion chamber assembly instructions for the HB Smith Series 45 Mills Water-Tube Boiler for automatic firing with oil or gas (Steam, Vapor,...