I've added many old Flyers non-trade transactions from 1967 to 1980 to the Flyers History site ( http:// www.flyershistory.com )
These transactions include signings, call-ups and demotions. As well many player injuries from this era have also been added. I've also uncovered a handful (4 or 5) ~very~ minor trades, which generally involve selling or buying a minor league player for cash, as well. These additions at leasts doubles what had existed in this timeframe for this type of information.