The Tuvaluan Dollar is the currency of Tuvalu - a small nation in the Pacific Ocean. Tuvalu has never had banknotes of its own, and has been issuing coins since 1976; these circulate together with coins of the Australian Dollar, which is also legal tender in the country, and to which the Tuvaluan Dollar is pegged.
The Australian Perth Mint issues a large variety of non-circulating legal tender coins under the authority of Tuvalu. Some of these are in the gold quarter-ounce format (abbreviated as 1/4 oz). Strictly speaking, they are not bullion as they are priced at a premium and are targeted at collectors who appreciate them for their artistic merit and collectable value and not just for their precious metal content.
The Mint says about this coin:
Thirty years after the box office success of Back to the Future, the Perth Mint is excited to present the Back to the Future - 2015 1/4oz Gold Proof Coin.
Back to the Future is an American science fiction comedy film released in July 1985 and starring Michael J. Fox as Marty McFly, a high school student who accidentally travels 30 years into the past to 1955, jeopardising his own future existence.