According Engineering News the South African Mint on Friday launched a sterling-silver R2 Crown and 2½c Tickey as part of its South African Inventions collectable coin series.The coins featured a series of dolosse – concrete units weighing up to 20 t – that are used to protect harbour walls from the erosive force of the ocean during storms. South African Mint product developer Richard Stone said the set, which was packaged with a miniature sterling silver mould in the shape of a dolos, was a source of pride as the dolos “put South Africa on the map when it comes to harbour protection across the globe.”
“The dolos was developed by East London harbour engineer Eric Mowbray Merrifield and draughtsman Aubrey Kruger, whose images are both included on the coin,” he said. The coins took six months to manufacture. “The coin is a great investment in craftsmanship and artistic integrity that will only appreciate in value,” he stated.
