>>The orb and rays of a monstrance should at least be of silver or silver gilt, and it is recommended that it should be surmounted by a cross.<<
Catholic Encyclopedia
“Catholic Encyclopedia”
Published in 1909. Thus, if we use logic, this monstrance could have easily have been made BEFORE 1909 since there sure seems to be silver all over it. And this pic sure makes it look like there’s a cross on top.