Metropolitan Opera - Lot of "Snake-style" Playbills 1961-1963

Group of original playbills (announcements of upcoming performances, playbills are distributed for free and they are a piece of advertisement) from the Metropolitan Opera, New York, period 1961-63. All playbills are in the "snake" style, printed in a very long but narrow piece of paper. 

A total of 9 playbills with many famous singers, various lengths but approx. 24 inches long by 5 inches wide, some have storage holes, all in very good condition.