Hello
It's possible that @Lazyboy has answered your question. I do not know if there were more than 1 print. I do know that in the past, we needed written permission to open any sealed packs. I do not think that has changed. So, If you wanted to send us these sealed, let me know and I will find out exactly what you need to do. I didn't see the G.I Joe Multipack in the OSF list. You can click on the "I can't see my comic link" and type it in that way. If you have any concerns, send me a PM, and I will contact customer service for you. As far as identifying them, here is what we wrote in the article.
Marvel multi-pack editions
Between 1977 and 1979, just prior to Marvel’s move to direct distribution, numerous issues from several Marvel titles were printed with altered covers and distributed in pre-sealed multi-packs. The main alteration consisted of placing the price and issue number within a diamond, rather than the traditional square box. These variants have sometimes been referred to as “Whitman variants” in the community, but some multi-packs were released by other distributors as well.
Marvel Regular Edition (1978)
Marvel Multi-Pack Edition (1978)
DC multi-pack editions
DC also released their version of multi-packs in the 1990s, specifically containing issues of Zero Hour and DC Universe (DCU). Zero Hour issues are identified by the Zero Hour symbol placed inside the UPC/art box, and DCU issues by the DCU title placed inside the UPC/art box. In addition to acknowledging newsstand editions, CGC will also identify both Marvel and DC multi-pack copies with a notation of “Multi-Pack Edition” on the label.
DC Direct (1993)
DC Multi-Pack (1993)
DC Newsstand (1993)
Zero Hour Direct (1994)
Zero Hour Multi-Pack (1994)