It looks credible to me. Is it mark and period?
The decoration looks too sloppy to be Daoguang period in my opinion. Colors and decoration look more Guangxu to me. The way the characters in the mark were written also don't look right. The faces also look more correct for Guangxu/very late Qing.
Bokaba
To me the direct comparison is very, very helpful, I can see the differences right now and can remember well.
Very good idea, thank you for that bokaba
I would be suspicious of marks that are on top of the glaze, it was either added at a later date or fairly recent made.
This type of "ghostly" faces were popular in the Tongzhi and Guangxu period.