1973-1979 TCMA All time Greats Postcard Size
 

Can anyone tell me if the individual series of 1973-1979 TCMA All time Greats Postcard Size were issued in specific years or if all postcards were issued in all years. I am also curious about the copyright date of 1973 on some, but not all series of the postcards. Were these only printed in two years (1973 and a subsequent year where they did not include copyright date) and then sold throughout the duration or did they put copyright date on first ones and then just use the same printing plate to print in subsequent years. Any information would be greatly appreciated.