This issue is a variant of The Uncanny X-Men (Marvel, 1981 series) #302 [Direct Edition]. There exist further variants.
Except for the cover everything else is exactly the same as the regular issue. As you can see the cover is missing the US price, Canadian and UK price, the "CC" logo and reference number as well as the UPC.
Letters from readers: Jonathan S. Asekoff, Daniel Savio, Yan Charbonneau, Shane Bekkemellom