Joint Reign of Justin II and Tiberius II (26 September- 5 October 578 
C.E.), 

JUSTIN II and TIBERIUS II. 26 September- 5 October 578 AD. AV Solidus (4.39 gm). 
Constantinople mint. 
DN IVSTINI ET CONSTAN PP AVG, crowned and draped busts of Justin and 
Tiberius facing, cross between 
VICTORI A AVCCC, angel standing facing, holding long staff surmounted by 
a Christogram and globus cruciger; Z/CONOB. 

DOC I 1; MIB II 1.1 (this coin—illustrated from a copy in the BM); 
SB 417. EF, traces of mounting on edge. 

Extremely rare; one of the supreme rarities of the Byzantine series. 

From the Glenn Woods Collection. Ex Sotheby's 2 November 1998, lot 121; William Herbert Hunt Collection (Sotheby's, 5-6 November 1990, lot 124. 

It is likely that no more than four or five of these joint-reign solidi exist. Considering the brevity of the joint reign, it is remarkable that such coins were struck or that any have survived, but their existence proves the ceremonial and legitimizing value of coinage. 

CNG Triton VII, lot 1082

With permission of cngcoins.com, Dec. 2010
 
sb0417