My copy came to me practically mint with no evidence of ever having been read. I suspect the shrink is something placed on the product prior to distribution, but not by the publisher, as with the TLG CZ boxed sets, but that's just an impression I have of small press works of the time.

Maybe someone here may have managed to track down one of the authors. Mars? But other than that, yours is the first copy I know of in shrink, so maybe if any of our more reclusive collectors have seen a copy in shrink, we may get a PM or a message.