Hi Vlad and David,
By the way David, welcome to the forum and thank you for the good information you have been adding!
* 1919 was the nationalization of all optico-mechanical works.
* About 1921 Lenin nationalized the banks, foreign trade, firms with more than five employees, and transport companies.
* 1927 was the collectivization on all agriculture.
So, I think that small shops that sold foreign cameras and photographic supplies were probably allowed to stay open for a few years, at least, after the Revolution, especially since there was not yet any Soviet camera production of note.
I have a Joachim & Sons catalog (a large importer and retailer of photo equipment in Moscow, Kiev, Odessa, etc.) from 1910 and it shows a very similar Trilby camera, but not the exact same model. Possibly this camera was produced for some time. My guess would be late teens - early 20s.
Here is a scan of the page from the catalog:
http://www.ussrphoto.com/UserContent/catalog1.jpgRegards, Bill