Hi Adam,
A broken hand mirror turned into a picture frame.
To me it appears to be a picture/photo frame and decorated with little Putti Angel Heads with C & Floral scrolls which could have been added after the mirror has been broken. The handle pointed end part damaged and twisted with the dolphin mark appears to be repaired(soldered back on). Could you please show us an image of the frame's back, does it have a wooden back? How is the handle attached to the frame? Does the composition of the frame's decoration, hanging parts and handle look original or could it be a sort of later marriage and are there no other marks?
Herewith an image of a hand mirror with a similar slim and pointed handle

Perhaps you could stick the pointed mirror handle in a holder to have both hands free?
The Dutch dolphin mark:the 1859 duty mark for new unguaranteed objects of national origin. This mark was used on all new silver objects below legal standard of fineness, those with non-precious metal additions, and on new heavily gold or silver plated objects, as long as the average precious metal content after melting with the base metal was at least 250/1000. It was also struck on rejected objects which had been submitted at lowest standard of fineness. In that case the maker had to choose between destruction or unguaranteed marking. This particular Dolphin mark used 1859-1893.
Oel