|Coin||Silver Crown 2020 Retinal Cryoprobe|
South Africa pioneered modern bullion coinage when it first issued the Krugerrand on 3 July 1967 to help market South African gold; it is the first modern bullion coin and is still issued today.
Gradually, the South African Mint started diversifying the range, first by issuing fractional Krugerrands, then by introducing different designs and metals, such as a silver one-ounce (1 oz) format. These include silver 1 oz Krugerrands, the Protea series, the Natura series, as well as one-year types that do not fall into a particular series. Some are made of Sterling silver (92.5%) alloyed with copper, just like the British pre-decimal Crown coins, and some are 99.9% silver. The Sterling versions are overall heavier though, so they also contain exactly one ounce of pure silver or 1oz Absolute Silver Weight (1.000 oz ASW); they are called "Crowns" in the "Crown and Tickey" coin sets in which some of them are issued, and are officially denominated as two, five or ten Rands.
This coin, denominated as Two Rands (R 2) is part of the Crown and Tickey series of South African coins issued with different themes every year by the South African Mint to celebrate South Africa’s history and achievements.
The 2020 Crown and Tickey series features a South African invention that has revolutionised cataract surgery. The retinal cryoprobe was developed by South African ophthalmologist and inventor, Selig Percy Amoils, at the Baragwanath Hospital in Soweto, South Africa.
The cryoprobe is a pen-like instrument that delivers extremely cold liquid gas, with precision and accuracy. The cryoprobe is inserted into a cut in the eye to deliver a liquid gas , which freezes to a cataract. The cataract (or other unwanted tissue) can then be removed with no risk of destroying healthy adjacent tissue.
It has since found applications in the field of general as well as veterinary medicine.
The obverse shows the Coat of Arms of South Africa at centre, dividing the date 2020, with the legend SOUTH AFRICA written around in all the eleven official languages of the country, the inscriptions in a pentagonal pattern with two rows on each side:
Ningizimu Afrika in Zulu,
Aforika Borwa in Tswana,
Afurika Tshipembe in Venda,
Afrika Borwa in Northern Sotho and Southern Sotho,
iSewula Afrika in Southern Ndebele,
South Africa in English,
uMzantsi Afrika in Xhosa,
iNingizimu Afrika in Swazi,
Afrika Dzonga in Tsonga, and
Suid-Afrika in Afrikaans.
The designer's initials ALS (for Arthur L. Sutherland) are to the left of the Coat of Arms.
The reverse of this coin features the anatomy of an eye, together with the years 1965 and 2020 above right, the value and denomination R 2 (Two Rand) and the inscription RETINAL CRYOPROBE below.
The initials of the die-sinker VLC (for VL Chipa) are in the top right field, under the optical nerve.
The circle on the crown is a place holder for the smaller "tickey" coin which, when placed onto the crown, gives the impression of a retinal cryoprobe procedure.
Around below left, the metal content and composition: 1oz Ag925 Cu75 (one ounce silver, 92.5% silver, 7.5% copper).
||R 2 RETINAL CRYOPROBE 1965 2020 1oz Ag925 Cu75
Mintage limited to 1,000 individually carded coins, issue price R 995, plus 1,200 in sets.