Monstrance Reliquary Bulb circa 1500

Our reliquary is made of gilded brass, chiseled, cut and openwork. The upper part decorated with Gothic pinnacles topped with a crenellated roof. The leg decorated with a knot in the central part resting on a multi-lobed base with grit. In its center, there is a vertical glass bulb.
Work of a French or German master goldsmith from the end of the 15th century or the very beginning of the 16th century.
Goldsmith's mark (?) on a section of the roof, letter F?
Dimensions of 29 cm high by 10.5 cm wide and 10 cm deep. Some shortages.