Where is the production data.
Always more important to keep accurate records, on who is doing what, where and when, in totalitarian states.
When it comes to production matters, you can have some idea, of exports etc, but little idea of how much was produced of particular patterns on particular days. (unlike Whitefriars it seems).
What makes any assessment of Czech production very difficult, is that there now exists a law, passed after the communist collapse, which means political papers, company documents etc, can be held, with no public access (for fifty years and can be re-newed), and which makes the thirty-year rule on access to UK Cabinet papers seem lax.
This is why information regarding a company like Kralik, whose papers still exist, cannot be accessed by anyone, despite the company finally folding in 1943.
I'm not convinced by the
sellers taking modern production and selling it as old
Whether a Vizner vase dates from the first days production and any others date between start, and finish of production, it is still the same product. Who can say that the modern product (say 1995 production) is not the same as the old product (1961), and why does it matter?
Why manufacturers should provide info, and who for, is also a complex issue. Obviously commercial issues are a factor, but to expect manufacturers to supply info, merely to assist the policing of a secondary market-place, suggests a level of corporate responsibility, that arguably is un-necessary, and paternalistic in the extreme.