Sportscaster cards were popular nerd status symbols in the late 70s - think Google for a 10 year old fan circa 1979. Full of stats and fun facts, they were larger (12cm x 16cm) and more substantial than baseball cards, and managed to cover an international array of sports, complete with Illuminati-level symbology for the pro collector. Some recent eBay "research" scored me the North American Cycling set. (The French series is much larger and more comprehensive, and is now on my list of "things-I-need-to-buy-but-not-really").
See the rest of the set here. I'm told that there are a few missing, but the completist in me (and eBay) will see that that is remedied ASAP.