2001 Centenary Of Federation Hologram Finale Silver Proof Coin
At the center of the reverse design is a colour hologram - the first on an Australian coin. Depending on the angle of view two separate images are visible. One depicts the Federation Rotunda while the other is a map of Australia showing the States and Territories in different colours.
The hologram utilises a method pioneered and patented by Australia's CSIRO (Commonwealth Scientific & Industrial Research Organisation) known as EXELGRAM. The optically variable properties of the image are produced by an extremely fine pattern of ridges. This ridge pattern known as a 'diffraction grating' causes light striking the image to be split into its component colours according to the spacing of the ridges in different parts of the design.
Note: This is a second hand item and may have ageing or minor marks to the outer box however the coin itself has no issues. The image used is a generic image as we have more than one available.
2001 Centenary Of Federation Hologram Finale Silver Proof Coin
At the center of the reverse design is a colour hologram - the first on an Australian coin. Depending on the angle of view two separate images are visible. One depicts the Federation Rotunda while the other is a map of Australia showing the States and Territories in different colours.
The hologram utilises a method pioneered and patented by Australia's CSIRO (Commonwealth Scientific & Industrial Research Organisation) known as EXELGRAM. The optically variable properties of the image are produced by an extremely fine pattern of ridges. This ridge pattern known as a 'diffraction grating' causes light striking the image to be split into its component colours according to the spacing of the ridges in different parts of the design.
Note: This is a second hand item and may have ageing or minor marks to the outer box however the coin itself has no issues. The image used is a generic image as we have more than one available.