Love your Frankie Meets the Wolf Man quad, Paul.
Did Eros distribute for Universal? Or is it a later RR?
Paul must be busy tracking down more one-of-a-kind quads.
From what I can find: per IMDb, Universal released Frankenstein Meets the Wolf Man here in the States in 1943 and in the UK in July, 1946.
Per wiki, Eros Films, a UK distributor started operations in May, 1947 and ended June 1961.
If those dates are correct, this quad falls between 1947 and 1961 in a subsequent re-release.
From the style, I'm guessing that it was one of Eros Films' earlier distribution ventures in those early years, between 1947-1952.
Great poster!