Thank you all for your observations, very enlightening.
Again seems to be the age old problem, do we retrain what has been passed down, sell it, or bring it up to-date? For those rising up the social ladder, how to look respectable with little cost.
Although have seen a few examples of appraisers remark that the silver object they are holding has for example was created as a 17th century covered tankard, had a spout added, then removed. What they had bought was now was not legal.
Another was a 17th or 18th century charger which now had a raised lion's face and modified border. New hallmarks had been applied as early as last year from the date of the show. For a purchaser or institution would depend on how much stock do you put in the object itself and it's provenance or not. Particularly for an institution it can have serious consequences for it's reputation and standing.
Thank you again