Not sure what these are

[Shakespear]

Would appreciate any information on the following. The first is from a market in Malaysia and the seller said it was from a shipwreck. The stamp shows no detail and the brown mark to the left of the stamp looks and feels like remnants of a wax stamp.
The second piece has quite a clear stamp on the back but I couldn't find anything similar on google. The pattern looks European and the writing looks a bit like Latin.
Not sure if either of them are Chinese or Japanese, old or recent. Hope you can shed some light on them.

Had a bit of trouble attaching pics so hope this works

[peterp]

The one on the right is a fake or new item. Decoration and mark are nothing traditional Chinese.

The left might be republic period -- perhaps -- might be worth looking at it, but larger images would be needed to evaluate that. Try about 100kb per image and a width of about 700 pixel. Separate images with details (especially faces) and base/foot rim clearly visible.