Coin Type: Australia 3d Threepence
Mint: Melbourne
Year: 1963
Metal: 50% Silver,40% Copper, 5% Zinc, 5% Nickel
Mass: 1.41g
Grade: PCGS MS66 Gem Uncirculated
Certificate Number: 18345749
Obverse: Queen Elizabeth II (Mary Gillick)
Reverse: Wheat Stalk and Ribbon device (George Kruger Gray)

This threepence is graded by PCGS as MS66. The reverse features some interesting rainbow lustre under loupe. It has some yellow toning present over a chrome plated appearance of the obverse. An interesting example straight from a genuine roll.  Is it possible that the paper from the roll caused this affect on the coin?