I've recently come across two Russian holograms. One of them was apparently made by a famous artist in Russia, though I have yet to validate that. Does anyone have any information on Russian holograms, have any history, know their value, etc? I would like to learn what I can about them before I decide to keep or sell.
The label reads as such:
Leningrad Factory of Artistic Glass
193019 Saint-Petersburg USSR
Professor Kachalov STR
Producer V. Brynskin
I've attached a few images for reference.
Thank for any help or guidance!
SweetD