This Ferrowatt branded 12AT7 was most likely made in eastern europe with a solid disc getter. Excellent construction and quality, and has balanced section so it is recommended for use in phase inverter positions or DACS.
These E188CC 7308 tubes were made in Heerlen Holland and are one of the best sounding 7308 you can find. Premium quality 6DJ8 variant that has a 10,000 heater and incredible inner resolution and detail. If you want the best, these tubes are the way to go!