I beg to differ.
In the NL I see a lot of real Dolnet sopranos, the only Dolnet sopranos that aren't Dolnet are the curved " Dolnet" sopranos made by Orsi ( but that's a diffent thing) because the brand didn't make any and Orsi did, I've actually seen and played on one. Saxpics has Curved Dolnet Soprano where under the typical 4 digits Orsi serial numb er by the thumbrest, dolnets didn't have it there, has the word ITALY ( still visible) scratched out!)
Anyway, the thing to be absolutely careful about is the fact that there are HP ( High Pitch) Sopranos made by Dolmet. They are not uncommon in the NL where I have personally veryfied the existence of soprano, alto, tenor and Low Bb baritone ( The low A should all be in Low Pitch).
I have a collector friend who owns a HP Dolnet soprano
Dolnet Sopranos are common over here in nickel and silver plate not quite so much in brass
If you like the keywork of the palm keys (by the way they are often bent to suit the players or whatever reason) I have never liked the in line palm keys of any saxophone and always preferred the arrangement which now is on all the saxophones.