A lot of the silver used on Mount Washington glass was made by their sister company Pairpoint. This particular mark is M.W.
![MW Mark on Silver by Mount Washington MW Mark on Silver by Mount Washington](http://www.mtwashingtonglass.com/wp-content/uploads/2012/09/mt-washington-glass-mark-09.jpg)
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A lot of the silver used on Mount Washington glass was made by their sister company Pairpoint. This particular mark is M.W.