Hi daisy0831 ...
The mark on your "Mason's" sorta looks like one used around 1940 & later .
Here's an image of one in the 'Vista' pattern .
I've found that simply using a search engine (Bing , Google, etc.) with the maker's name + 'ceramic' , 'pottery' , 'ironstone' (etc) as well as the term 'marks' , 'hallmarks' or 'makers' marks' will often come up with alot of results .