I have a Loetz Formosa bowl up for grabs at the moment:ebay auction link
I have had a question from a potential buyer about the base, who asked for more pictures of the base, which I have sent him - you can see the gallery of these pics here
He has now asked a further question that I would appreciate some help with. The base has been lightly ground flat, taking the tops of the threads on the underside. I assumed this was normal as the threading could have made the underside unstable. The potential buyer is asking if this was done at the factory, or subsequently.
This is the first piece of Formosa I have seen - I am still learning about Loetz as I go, although I love it very much - so I haven't seen any others to compare. Is it usual for the threads to be flattened on the base, or could this have been done later to disguise damage? There is a fair bit of wear to the flattened threads, but considering the date, that could be expected even if the grinding was subsequent, if it was also a vintage repair.
thanks for any help you can throw my way.