excellent pair ECC88,  Philips,  6DJ8, Bugle Boys

plant: Heerlen, in the very south of Holland, 1962

both tubes coded: GA7 ∆2D4,  triangle sign, similar extra code 2-27

big ring getter, used, but testing NOS and nearly NOS

see pics for test results:  19 / 19, 14 /14

tested  on AVO MKII tester , at Va =90 v, Vg= -1,2 V, 

and  Ia = 15 mA means new

ecc88 1962  pair AA