Tokelau, known previously as the Tokelau Islands, is a dependent territory of New Zealand in the southern Pacific Ocean. It uses the New Zealand Dollar as circulation currency, but has been issuing a variety of non-circulating coins since 1978, and has also authorised some foreign mints to issue bullion coins under its jurisdiction - such as this one.
This coin is part of the Chronos series of bullion coins which started in 2015, and features changing designs every year, all with the same message referring to the well known phrase "Panta Rhei" by the famous Greek philosopher Heraclitus. "Chronos" (time) is a reference to the lasting value that precious metals have held during human history.
The mint says about it:
"Panta Rhei" - Everything flows and things come and go. When it comes to value, precious metals have always held a crucial position in the world of finance. Nowadays, a safe haven at the very least, a financial norm in the past. Silver currently holds an especially important position in the financial world and we believe it will continue to do so for a long time. Now and forever. | 
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