The M269c is a broadcast version of the famous U67 but with a different tube AC701. The same model designated M367 was used by the ORTF. Only difference with the M269C :.... its connector!
Warm and clear sound, incredible depth!
Used for 20 years .... yes I am no longer young but ....... nothing to do with her at the "copies" (imitation and presentation at the found to 300Euros mm and less)
It must have worked with to understand!