This is an odd mark found on some Royal Flemish products produced by Mount Washington. The traditional mark is an RF. The mark shown is also excepted as authentic.
![Mount Washington Royal Flemish Mark Mount Washington Royal Flemish Mark](http://www.mtwashingtonglass.com/wp-content/uploads/2012/09/mt-washington-glass-mark-06.jpg)
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This is an odd mark found on some Royal Flemish products produced by Mount Washington. The traditional mark is an RF. The mark shown is also excepted as authentic.