With the Top‘s history featuring prominently in the current Flash tie-in to Identity Crisis, I realized it’s possible to narrow down just when the flashbacks in IC take place. I’m not very familiar with the satellite-era Justice League, but I have tracked down, read and, yes, catalogued the entire Barry Allen run of The Flash.
In Identity Crisis #2, Green Arrow states that it was a few months after Iris died. Iris died in Flash vol.1 #275, and the storyline wasn’t really resolved until #284, when Barry trapped her killer on the wrong side of a time machine. In Flash vol.2 #215, Barry writes about an event that took place a week after the Top’s ghost was excorcised from Barry’s father. That storyline ran from #297 (the car crash in which Henry Allen’s heart stopped) to #303 (getting rid of the Top). Since this was clearly after the *ahem* incident, we can narrow it down to taking place between Flash #284 and Flash #297.
(This has got to have been the most fanboyish post I’ve made here…)