The 2018 sterling-silver Crown and Tickey set includes a R2 crown-sized coin, a 2½ c Tickey coin and a stunning sterling-silver model of a human brain, packaged in a beautiful piano finish varnish, walnut wood box.
The 2018 South African Inventions theme features Computed Tomography (CT), invented by Allan McLeod Cormack. The CT is an imaging procedure that uses special X-ray equipment to create detailed pictures or scans of areas inside the body. It is also termed computerised tomography and computerised axial tomography (CAT). It uses computer-processed combinations of many X-ray measurements taken from different angles to produce cross-sectional (tomographic) images (virtual "slices") of specific areas of a scanned object, allowing the user to see inside the object without cutting. The 1979 Nobel Prize in Physiology or Medicine was awarded jointly to South African American physicist Allan M. Cormack and British electrical engineer Godfrey N. Hounsfield "for the development of computer assisted tomography."