Grateful Dead BLUES BROTHERS Dec 31, 1978 WINTERLAND Blue Rose NRPS Mouse KELLEY

The product is a vintage poster featuring the Grateful Dead and the Blues Brothers from their New Year's Eve performance at Winterland on December 31, 1978. Frame measuring 27 x 37 inches. Visible poster measures approximately 18 x 28 inches. This rare piece of music memorabilia captures the essence of the rock and pop genres in a unique and iconic way. Made in the United States, this poster showcases the fusion of these two legendary bands in a visually stunning and nostalgic tribute to their classic performances.

I've seen similar posters claiming which printing and I'm not sure how to determine that. Also I wasn't sure whether to mark as an original or licensed reprint.