Hi Zolotnik,
In general not much is known about the Artels and Postnikova-L for the Artels not of great use. What we can find on the internet is written by you and Qrt.S. I read; the 3rd Artel mark is rare and very few objects known.
http://www.silvercollection.it/dictionaryartelsMO.html
I believe an Artel had more than one punch and after a certain working period had new punches made. Conclusion we might expect some differences in their punch marks.
Looking at your images top down;
The 2nd Artel, the few marks shown for the 2nd Artel have ‘soft’ corners but not clipped corners. To me the hallmarks with 2nd Artel mark look authentic and the marks are not tempered with but...
The 5th Artel is straight from your list and with authentic hallmark (Kokoshnik)
The 9th Artel, the first three marks look not bad and have beauties of Kokoshniks, the 4th image of the 9th Artel mark, I should put on hold and needs a further check.
The 13th Artel mark looks fine to me, the gilding has made it a little unclear, and the 2nd image of the 13th Artel mark is perfect, if I can trust your list.
The 23rd Artel marks are not according your own list but it could be an unregistered mark used by the 23rd Artel because the hallmarks look not bad.
Is Russian silver is getting a bad name?
Russians buying back their heritage. The popularity of Russian silver created a tsunami of fake Russian silver. Already the fakes are getting too good for us to be recognized as such. Today’s willingness of people to buy Russian silver with fake or pseudo marks and for a ridiculous high price at auction is absurd. Tomorrow the expensive but fake Russian 3rd Artel enamelled silver box should be worth no more than the value of the silver or could strong powers prevent this?
Regards,
Oel