Philips 819 line TV receiver.

[Terry]

You said this set had reduced bandwidth, as did many 819 sets.

Don't forget that Belgium used a version of the 819-line system but crammed into a standard 7MHz channel with a 5MHz vision bandwidth. It would have been a simple matter to make receivers with a 5MHz vision bandwidth and switchable sound frequencies so that French viewers living within reach of the French language transmitters in Wallonia could have a choice of viewing. The same sets could also have been sold in Wallonia to give the Wallooons the same choice, in reverse, of RTBF and RTF.