04-05-2017 11:17 AM
04-05-2017 01:58 PM
looks like
"d" on bottom check delft
04-06-2017 02:03 AM
04-07-2017 08:56 AM
04-07-2017 08:57 AM
04-07-2017 09:42 AM
The blue "D" or spot could also be a decorator's mark. Or just a spot, like you say. No way to know who the decorator was, if that indeed is what the mark is.
Lee