(!!!) (Good Value Pair) ECC81=12AT7 IEC Mullard used/good 1967 (6.8/7.0ma and 7.0/7.2ma) (Jolida, Fender)
(!!) (SINGLE) ECC81=12AT7=CV455 Mullard BVA UK copper grid posts NOS 1962 (10/10.6ma)
(!!) (SINGLE) M8162=12AT7WA Mullard UK copper grid posts NOS 1963 (9.2/13.5ma)
12AT7=ECC81 Mullard low hours/like new 1970 (8.0/8.4ma)