Condition: NIB - Sel Lorenz PCC88 with frame-grid made by Tesla Rožnov Factory production from the former Czech Republic in 1968 - 1969. Lorenz only made their own tubes for a very short time and choose to outsource production to alternate factories Engineerd and designed to their specifications. PCC88 are drop in replacements for ECC88/6DJ8/E88CC with a slightly higher heater specification of 7 volts producing a much longer life and lower noise threshold when used in place of ECC88/6DJ8.