These projector slides were distributed by the NFL to TV stations as graphics for production. Not exactly sure when the NFL started, I've seen some references state that 1968 was the first year producing these, but I've seen examples labeled as early as 1966 on Ebay, though I'm not sure if those were produced by the NFL or not. I believe 1987 was the last year these were produced.   I'm missing anything prior to 1968, if exists, the entire 1969 and 1974 sets, as well as a handful of slides in 1980, and 1987. If you have any not displayed, please email me at HTTR@CollectRedskins.com