Looks like a one wich can be opened to put a relic in! I have only found one but the back was missing and it was empty. This one looks untouched! Very nice find!!!
9118. FINE BYZANTINE BRONZE RELIQUARY CROSS, ca. 9th-12th century AD. Christ crucified one side with cross above, the Virgin orans on the other, swivel suspension loop above. 3.25 inches. Such reliquaries were used to carry relics of Saints, Martyrs splinters of 'the true cross' and other religious relics. Choice intact example.
Price: $2250.