Datacomp.
If you figured out boards original maker like this, you could know that kind of STBL with easy.
Of course this tip does not gaurantee 100%, because they are big and old company.
Sooo many goods are from there.
Following boards have STBL you are looking for..
Filco wirless keyboards,
Filco wirless/wired keypads (Not sure 19s, but pretty sure 22s)
Some *ucking Lie-fold series (FC 200RT/300R/700RT)
(except. Phaethon FC100 of Strongman, Phaethon FC200R/LieFold FC200R of Costar)
and, Yes, Wyse, Steels series.
Etc..
and one more funny thing.
All keycaps of above boards are some kind loose.
It is sooo easily dismantled (such as tip/tap action).