In very good and working condition 3X 6SN7GT Tube RCA Grey Glass Branded Marconi Square Bottom Getter tested with a result of 2100/2300 , 2300/24050 and 2500/2500 GMT on my Stark Tube tester 9-66 where the minimum good working is 1260 and the maximum NOS rated at 2000 GMT.

               

                                          Shipping is $18 for Canada , $15 for USA and $25 for others countries.