James, With these pictures I cannot tell you much except that it is a Qianlong mark, but probably of a later time. The bottom shows that it is probably older than the other items. To say more close-up pictures (partial) of some details would be needed, e.g. the bottom, the writing, especially the end with the signature, the peaches and bats, the mouth and the glaze, especially if there are impurities, etc. Just be prepared that it could be a fake. The large majority of peach decorated porcelain items are fakes. If it is more conventione, you can upload pictures on Flickr or elsewhere and post the link here.