Glossy Picture Sleeve
Wuthering Heights was issued with 2 slightly different sleeves in The Netherlands. The orange one with a matte finish shown on the preceding page, and the yellow/orange one with a glossy finish shown above. It's difficult to tell them apart on this website, but the differences in tone and finish are readily apparent when they're held side by side.
The discs are a little different as well. Discs in glossy sleeves have tan EMI labels; the discs in matte sleeves are more pink. Information courtesy of Bart.