I received a cache of gently read LeTourneau NOW newsletters in the mail yesterday. These company newsletters were published by R. G. LeTourneau. Inc. and mailed to whomever wanted to read it free of cost. The date range for these newsletters closely aligns with the Overland Trains development, including the Firestone 120x48x68 tires. I have scanned the December 1, 1953 issue and embedded it if you would like to read or download the issue.