Thank goodness you found the ad or I would have had no idea!
The White company had bought Domestic by then so that is the clue. In the same few years around 1955 White started to import a GERMAN zig zag machine and put their badge on it. (And also sold the same machine to Sears who put a Kenmore badge on it.) I did not know they had done the same for Domestic their 'budget' badge! I am no expert in the European made zig zag machines but you will need to look for that kind of information for tips.