That is a gross over-simplification, many such marks may well have an explanation. We do not know everything about the history of silver marking yet, there is still much to be discovered.it would mean that whatever marks on whatever object not fitting into official known standards and/or marking systems would be explained as exceptional marks used by this and that (possibly closed) community here and there who didn't care about the local legislation
Neither did British legislation, but there is no escaping the fact, it happened. If you look at things in geographical terms, then if it happened in Great Britain, then it was far more likely to happen in an area the size of that under Russian control.What you wrote above cannot be applied on Imperial Russian silver marks, so forget it at once. The Russian legislation did not permit it.
Well obviously it didn't.That would ruin the whole worldwide official silver marking system
Are you really saying that silver from countries that have no, or no longer have a, hallmarking system are incapable of producing silverware of a trusted standard?Factum est: No marks or incorrect marks, not silver!
Regards, Trev.