Opinions On Snowtrooper Skirt - Original Or Repro ?

[ChallengerFox]

As per title, any ideas if this is original or repro, I picked it up in a childhood collection a guy was selling, he said they had been in his loft for 20 years and everything is original, don't think he was lying as he didn't know much about them

One side has a pattern(see 1st pic) and the other side doesn't , but the pattern side doesn't do the zipping noise, are they all supposed to zip ?

Thanks

 

[poncho]

One side is matt one is shiny and there quite thin.