GAP this is a very nice crafted piece indeed personally I do not think this is from the 17th century but more into the late late 18th or 19th century. I won't even put a value on this til that mark is IDed.. I will shoot a email over to a friend of mine who will be able too tell what those symbols mean and possibly be able to ID it for you but if you talk to you're friend ask him more details about who and why someone said this was 17th century, Japan pottery can be lot harder too study and ID than American pottery it is very tricky unless you are from Japan and know lot about it.