(!!!) (Recommended Single) 12AT7=ECC81 Mullard shiled logo used/tests like new 1963 (15.8/14.8ma)
(!!) (recommended single 1957) CV455=12AT7 Mullard "D" getter like new 1957 (12.4/8.6ma)
(!!) 12AT7 Brimar England black plates "U" getter used/good 1950's (6.0/6.4ma)
(!) 12AT7 Mullard Heath "D" getter used/good 1959 (6.4/7.6ma)
(!) 12AT7 Mullard Heath "D" getter used/like new 1960 (8.0/9.6ma)
(slightly microphonic tube) 12AT7WA=CV455 Mullard NOS "curved D getter halo" copper grid posts 1959 perfect printing (8/9ma)
