Fragment of a box with a combination lock
The David Collection
Hegira 597 / AD 1200–1201
Box, metal work , cast, silver, copper
Cast and hammered brass, inlaid with silver and copper
Seljuqs (Great Seljuqs)
This combination lock is the work of the astrolabe-maker Muhammad ibn Hamid al-Asturlabi al-Isfahani in 597 H.
The four double dials, each of which can be set in 16 positions, allows for 4,294,967,296 combinations. When the right combination is entered, it releases the inner metal plate, attached both to an external handle and to the locking mechanism itself.
"Fragment of a box with a combination lock" in Explore Islamic Art Collections , Museum With No Frontiers, 2017. http://www.museumwnf.org/thematicgallery/thg_galleries/database_item.php?itemId=objects;EPM;dn;Mus21;22;en&id=scientific_objects
MWNF Working Number: DN 22