Majia Isola was a pretty famous Finnish designer:-) It´s a pretty large piece (more than 2m, 130cm wide) and I am planning to make it into a dress. Unfortunately, I couldn´t find any information about this particular print (Maija Isola "rosmariini" Marikangas Maritextil), but I found an ebay listing for her most famous design from the 50ies for USD 150 for 98in. (I only payed CHF 8 for my piece;-)). Please leave a comment if you know anything about the release date or history of this print!
Update: the print is from 1962 - the folks at Marimekko were super kind and answered my email inquiry! Here´s a link to the rosmariini print in different colors and many more amazing designs: Marimekko Design Museum .