This is from the famous Ca Mau shipwreck, which led to a huge sale in Amsterdam at Sotheby's. This is a lovely saucer with no damage except for some pinpricks on the back and a clear speck caught in the glaze on the front. It has a 4.25 diameter.
The teabowl is also really lovely, a few pinpricks, it rings. This item is in the category "Antiques\Asian/Oriental Antiques\Chinese\Porcelain". The seller is "paula5582" and is located in this country: GB. This item can be shipped worldwide.