pic 2
The metal components for Diana products are manufactured in Gabrovo, Bulgaria by Gabinvest EOOD.
pic3
The assembly takes place in Ense, Sauerland, the headquarters of German Sport Guns
I think covers the cheap Diana's other than the rebadged Chinese ones.
That article was 4 years ago, has production changed since then ? I don't think Diana would be in any rush to tell us.