Ah! Great amp I'm sure! Congratulations!
Udo Roesner is the founder of German company AER Amps. It actually looks exactly like an AER amp. The Da Capo 75 is like an improved AER Compact 60/4.
In 2018 he together with his former colleague Thomas Mattiussi founded the new company MARco-labs in France which developed this new Da Capo amp. Production is in Indonesia.