Rare piece... Old reliquary and 3 medallions (silver)? 18th or 19th century? Origin?

Description
Rare piece... Old reliquary and 3 medallions (silver)? 18th or 19th century? Origin?
In good condition

Rare piece... Reliquary from the late 18th or 19th century, in good condition despite its advanced age.
On the front you can see ‘2 red windows enhanced with gilding’.
Origin unknown.
I am including 3 medallions... Silver or silver-plated? (see pictures).
Weight of the reliquary: 15 g.
Weight of the 3 medallions: 11 g.

Lot details
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