The wrapping didn't give any clue as to if the packs were devoted to one particular series or if maybe they were a hybrid containing both series but I recognized all the cards shown as being from Series 1. They were marked at 98 cents a pack and so I picked up three...and as you can see, each pack "CONTAINS GUM!"The verdict: these are indeed Series 1 packs. And it looks like Topps substituted the possibility for inserts for some leftover Heritage gum.
Pack 1

