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(!) 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)
