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Re: Da Qing Qian Long Nian Zhi bowl
The stamp on the bottom appears to be done by a rubber stamp as opposed to hand done, which is indicative of late 19th century and early 20th century pieces. There are literally hundreds if not thousands of these maker marks for the time period and it will require an expert in identifying asian art markings for further evaluation. May I suggest gotheborg.com, I believe that is their adress anywho. Absolutely stunning resource for chinese markings and you can pay $10 or some small fee for personal input from one of the most knowledgeable experts in thie field.