{"value"=>"Items 250-546 were interleaved as follows: 250-347, 348-360, 361-387, 388-454, 455-463, 464-484, 485-509, 510-511, 512-516, 517-527, 528-533, 534-538, 539-546. Within this folder, items 512-516 were found inside the cover of an issue of Signale für die musikalische Welt of August 29, 1917."}