Just an info based on the look inside my Monbrison:
entry 2 6X4
line 2 ECL94s (fantasy name, an ECL tube nevertheless)
phono stage: 2 ECC82/12AU7 and 2 ECC83/12AX7
The former Monbrison version without window incorporated 2 x EF86 Phono Input, 1 x 12AU7/6189W Phono Output, 2 x ECL82 Line.
I haven't seen any Massetto, as it has not officially been imported in the EU.
entry 2 6X4
line 2 ECL94s (fantasy name, an ECL tube nevertheless)
phono stage: 2 ECC82/12AU7 and 2 ECC83/12AX7
The former Monbrison version without window incorporated 2 x EF86 Phono Input, 1 x 12AU7/6189W Phono Output, 2 x ECL82 Line.
I haven't seen any Massetto, as it has not officially been imported in the EU.