Led Zeppelin stairway To Heaven Promo 7 Picture Sleeve W/mono/stereo Single

Very Rare Promo only PICTURE SLEEVE 7 version of Stairway To Heaven.
Not issued as a commercial 45 in the USA.
This Radio white label pressing has a MONO version A- side backed with the same track in Stereo.
THIS is the BEST condition copy I have ever come across.
Picture Sleeve is clean, no ring wear, the vinyl record is Mint.