#OTD - 1 July 1958
BBC Test Card C modified with BBC identification and extra centre arrows
#BBC #BBCTestCard #BBCTestCards #TestCard #TestCardHistory #TestCardC

#OTD - 19 April 1964
BBC Test Card C retired. It was replaced the following day by Test Card D
#BBCTestCard #TestCard #TestCards #TestCardC #TestCardD

#OTD 1st Apr 1950
BBC #TestCardC was modified from 5:4 to 4:3 aspect ratio.