Pair of Mullard M8136 / CV4003, box plate.
New old stock.
Both test very good;
valve 1; 10.5ma @-8.4v / 10.5ma @-7.9v (99% / 93%)
valve 2; 10.5ma @-7.4v / 10.5ma @-7.3v (87% / 86%)