I had not seen the amended comments. Pontil marks are a bit of an anomaly for me. I find them to kind of run a gamut of styles, even from the same maker. I tend to weigh pontils as a small part of big picture, unless of course it excludes a maker right away. To me, a flat polished base would be something that would generally rule out Loetz production. Off hand, I can not think of an example of their production with that type of base finish.