Curious about 1973 Topps distribution

[bigfanNY]

The Article says that Topps hopes to have all 5 series distributed to most of the country by April 1st. And the article on 1973 wrappers says that only 5th series wrappers say all 660 cards. Series 1 thru Five had Vending cases. I have only ever owned a 1st series box but have seen other 1973 Vending cases from a unique series. Yes Topps shortened there distribution and by late April or May in some places you could buy packs from all 5 series but that is very different from packs containing cards from all 5 series which was the case in 1974. Anybody out there own a 1973 vending case with cards from all 5 series? 1973 cards were issued in series. The article on wrappers also says where checklist cards came from some 5th series packs had them included and had an offer on the wrapper to get a set. my understanding limited distribution I never opened a pack of 1973 5th series with a checklist card but I opened a number of 5th series packs back in 73.