​Original old petroleum magazine vintage ad for JOHNS-MANVILLE.  Thermal insulations reference chart, yours for better insulation service.  Now you can see at a glance the recommended insulation for every temperature range, from minus 400 to plus 3000. Each insulation in this group of products is tailor-made to do a specific type of job best.
This 1950 unique one page oil and gas industry asbestos advertisement would display beautifully matted and framed.