The mark is for 'Dunkirk Silversmiths' of Meriden, Connecticut. They were active from around 1945-1950 and succeeded by the 'Gold Recovery & Refining Corporation'.
It's a shame when people only show us the maker mark but not the piece itself.
To share what I didn't know....
"The phrase, 'reinforced with cement' means that the void(s) in the piece (holloware) is filled with a cement-like resin to strengthen it. Silver is a very soft metal and needs reinforcement in many applications. It is also used to add weight to pieces like vases to keep them from tipping over, and those would normally be marked “weighted”.