First and reissue sleeves are both made of paper and virtually identical to each other.
The record labels on first and reissue sleeves are pretty much identical as well. The only way to tell the vinyls apart is through the first issue release. The run off on Side A has the inscription "For Rolf", which is a nod to Rolf Harris for playing the didgeridoo on the track. Reissue vinyl will not have this inscription.
I've also got a photo here that shows the inscription as it happens to be another one that was etched fairly largely into the vinyl, so it's pretty easy to capture with a camera.