I think your questions are good. I think your missing one very important question what is it used for? Maybe you already know the answer though. I like how you kept your questions very broad. By keeping them broad you can incorporate a wide array of research. I really like question #4 because you can relate your object to a historical event or some other event of importance. When you ask when was this object used, do you mean what date in history? Overall your question are good.
I think your questions are good. I think your missing one very important question what is it used for? Maybe you already know the answer though. I like how you kept your questions very broad. By keeping them broad you can incorporate a wide array of research. I really like question #4 because you can relate your object to a historical event or some other event of importance. When you ask when was this object used, do you mean what date in history? Overall your question are good.