Roman Empire, Maximinus I 235-238AD Sestertius gFine Gold - 0.5g Proof The reverse of the coin

The reverse of the coin depicts a kangaroo hopping across the Australian landscape with a lizard perched on a rock in the foreground

The coins are packed to maintain their high lustre

Jupiter commands quadriga left

the new aluminium-bronze $2 coin took the place of the $2 note during Australia's bicentennial year

The manta ray is one of the largest marine species on the Great Barrier Reef

Roman Empire, Maximinus I 235-238AD Sestertius gFine Gold - 0.5g Proof The reverse of the coinRome 235 236AD Obv: IMP MAXIMINVS PIVS AVG Bust of Maximinus I, laureate, draped, cuirassed, right. Rev: PROVIDENTIA AVG S C Providentia, draped, standing left, holding wand in right hand over globe decorated with stars and zones and set on ground and holding cornucopiae in left hand