Just recently professionally Amplitrex T1000 tested, including for noise, gas and shorts. Matched pairs.
2200 +/- 20% = new according to the Mullard specification book.
Prices include PayPal and shipping to the lower 48. All positive ratings of 402 on A'gon and 19 on US Audio Mart.
Amperex 12AU7/ECC82 O getters 1961 & 1967 Holland production
Very tightly matched and balanced pr (2200/2200 & 2160/2200) - $125 SOLD.
Mullard 12AU7/ECC82 (labeled Hewlett Packard by Amperex)
O getters, Blackburn date codes: B3E3 & B3F3 (2060/2000 & 1960/2070) - $120
Mullard (HP label) 12AU7/ECC82 Very tightly matched & balanced
quad, all with the same Blackburn date code: B4F1
(2100/2000 & 2100/2100) (2100/2100 & 2100/2100) - $140/pr or $260/quad
Mullard CV4003/ECC82 box plate. Very tightly matched & balanced
pair with the same Mitchum date code: R4D5 (2200/2200 & 2200/2190) - $160
