The Caspian Tern series belongs to South Africa's ongoing Natura programme, which shifted toward colorized issues in the 2010s as collector demand for applied-color silver coins grew sharply across the global commemorative market. The colorization on these pieces is applied post-strike, a process the South African Mint contracts rather than performs entirely in-house.
KM#630 is a low-mintage collector issue with no circulation purpose whatsoever.
The Caspian Tern series belongs to South Africa's ongoing Natura programme, which shifted toward colorized issues in the 2010s as collector demand for applied-color silver coins grew sharply across the global commemorative market. The colorization on these pieces is applied post-strike, a process the South African Mint contracts rather than performs entirely in-house.
KM#630 is a low-mintage collector issue with no circulation purpose whatsoever.