It could hardly be that old! I have several of this kind of thing purchased from a flea market in Moscow near the University in 1997; I
had always assumed that they were 19th century (if not manufactured the week before). If anybody can explain the exact use of these (a pilgrimage souvenir or portable devotional image for travellers, etc.) please chime in! Here is one I like (again, a horrible scan). George Spradling