a Swiss gentleman, Mr Petignat, contacted me through the RadioFil French forum. He does not speak English.
He has a 21CT55 color TV which was modified which was modified for NTSC 625 experimental tests in Switzerland in 1957, this is therefore a rare prototype set. He also has a spare CRT (should be 21AXP22 glass/metal)
The original VHF tuner was replaced with a CCIR B standard VHF tuner to comply with European TV channels. The TV was used for OTA tests on channel E2 via the Berne (Bantiger) transmitter.
Have requested some pictures of the TV, chassis & spare CRT.
