Eb Alto
Bb Tenor
Eb Baritone
Bb Bass
All dated between 1912 and 1939.
I took this screenshot on mimo-international.com. The links there to the Muziekinstrumentenmuseum are broken. You can find the horns through https://carmentis.kmkg-mrah.be/eMP/eMuseumPlus.
Sadly, the pictures aren't any bigger.