The reproductions lack the movie number stamping of title and movie number on the back of the poster; some reproductions are smaller than 27"X42"; colors on the reproductions can look splotchy and uneven; black color on reproductions does not look dark black, kind of a light black or grey; copies are glossy-type paper while originals are on "flat paper".

Source & scan: The Beatles Memorabilia Price Guide 3^rd edition