Hi, I’ve got these three ashtrays (I think) that are obviously Delft, I think Royal Delft, that were made in 1969 from what I’ve researched but I’d really like to know where they were made and by who. Does anyone have any info on these things? 2 of them were made by the same person at 2 different locations if I’m reading the marks right and the 3rd was made by a totally different person at a totally different location… Again, I think! Thanks in advance for any help.