Schwann CD catalogue from November 1987 lists this with the date as August 1987, but the catalogue's introductory notes say that any date given is the date of the issue where the disc was first listed, and as Schwann, like many other publications, was post-dated, the actual release month could be as much as two months earlier.
This is possibly a 1987 release at the very earliest.
This particular CD is listed on discogs as a 1987 release and "http://www.ac-dc.net" lists it as a November 1988 release. The first ever AC/DC CD appeared in 1985, being pressed in Japan for the Australian market.
Some interesting information can be found here:
http://forums.stevehoffman.tv/threads/ac-dc-first-australian-pressings-cdp-made-in-japan.202865/
http://forums.stevehoffman.tv/threads/ac-dc-pre-88-cd-pressings-info-wanted.181865/
Does anyone have any thoughts or a definitive date? There are a number of pre 1987 U.S. CD releases for AC/DC on 45worlds that need more accurate dating.