Irina, The pot and box are common rose medallion items, as is the saucer/bowl. Please be careful with the latter type. It could be later. (There is a lot of vintage and printed newer rose medallion export porcelain.) The first two are probably Qing dynasty.
The third one is something differnt. It has a Mandarin pattern (not rose medallion) and could be earlier. Impossible to tell when from this picture.
