matched pair ECC83 / 12AX7 Philips Miniwatt, made in Holland, audio twin triode. 

Test very good on AVO tube tester.

(Avo book spec for new valve: 1,6mA per triode).

Test result: first tube 1,7 - 1,7mA code delta7c

second tube 1,6 - 1,6mA code delta8I

Early 17mm long plate and foil D getter type.