Before there were computers, and even before there were copy machines and even before there were mimeograph machines, there was carbon paper. And, here is some of the finest from Miller-Brant-Pierce a division of Smith-Corona Marchant Inc.
Each of these folios measures 11-1/2 inches by 8-5/8 inches. Within the folder are 3 sheets of very high quality unused carbon paper (11 by 8-1/2 inch) for typewriting. The cover has fantastic graphics and the back cover (shown partially in the illustration) advertises other products by the Miller Line. Their tag line at the top reads in a wonderful modern-for-the-time font,
"The Miller Line is Superfine"
These are in very fine condition and we have enclosed them in breathable plastic for transport to you. The original package was simply the paper folder with the carbon paper and a carrying sheet as enclosed in each package. We have seen such packages sell for up to $35 on eBay and other vintage product sites.