Mr Jones was an “admirer” of Hitler and had a gift edition of the Nazi leader’s book Mein Kampf, he had previously told the jury.
His girlfriend, Ms Cutter, had entered a “Miss Hitler” contest under the name “Buchenwald Princess” referencing the infamous Nazi concentration camp.
Giving evidence, Mr Jones rated himself as “probably a seven”, on a hypothetical chart of how fanatical a National Socialist supporter he was – with Hitler at 10.
Mr Jones also said he posed for a photo with another man, both giving a Nazi-type salute, and with the National Action flag unfurled, inside the execution room at Buchenwald.
The other man was group co-founder Alex Davies, Mr Jones told the jury.
Mr Jones and Ms Cutter are on trial alongside Garry Jack, 23, of Heathland Avenue, Castle Bromwich, Birmingham, and Connor Scothern, 18, of Bagnall Avenue, Daybrook, Nottingham, who both deny the same charge.