As multiples

1. Does "their" refer to "Farah’s destroyed images"?

2. Does "as multiples" mean "as other versions of the images?

Context:

They claim that they contacted a local photographer, Abdallah Farah, who had been hired to provide images of major landmarks in Beirut, mostly of the lavish hotels and beaches of the “Lebanese Riviera,” and to produce tourist postcards, during the 1960s. After the civil war began in 1975, Farah is said to have begun destroying the negatives of these images in his archive as the landmarks they represented were demolished, in a kind of ongoing mirroring of destruction. In this series Hadjithomas and Joreige allege merely to reproduce Farah’s destroyed images; their reworked postcards have also been distributed as multiples.