DOC is available for download from the publisher.
"The 12,000 coins in the Dumbarton Oaks Collection and the Whittemore Collection at the Fogg Art Museum form one of the greatest specialized collections of Byzantine coins in the world. The catalogue, edited by Alfred R. Bellinger and Philip Grierson, publishes the majority of these coins, dating between 491 and 1453, in five volumes."
Volume 1 Anastasius I to Maurice, 491-602 Volume 2 Phocas to Theodosius III, 602-717 Volume 3 Leo III to Nicephorus III, 717-1081 Volume 4 Alexius I to Michael VIII, 1081-261Volume 5 Michael VIII to Constantine XI, 1258-1453