Elmgarden has dated this piece to the 19th Century.
This beautifully Baroque Sterling Silver Monstrance is French it dates from the 1840s, the rays of the radiant sun is typically 19th century French design, these and the Lamb of God decoration are in Vermeil (18k Silver-gilt ).

Theres is more elaborated decoration Wine, Water, and cherubs and at the base the name of Yahveh
The piece is in excellent condition for a piece of this age
Base, cross, luna and a ray of sunshine are stamped with the French “Minerva” silver mark 950-1000

The Cross is stamped by the maker's mark : André Michel
The Luna is stamped with the maker's mark : Jean Baptiste Garnier
FN64
Weight of the monstrance : 695 grams 22,34 Troy Oz
Height of the monstrance : 55,7 cm 21,93 inches.
Diameter of the radian sun : 27,5 cm 10,82 inches
Elmgarden has dated this piece to the 19th Century.
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