PL mintmark of the 1951 London sixpence
The 1951-PL sixpence by far the most common sixpence of the Type II George VI series due to the large initial mintage and while the coin is always very well struck up, the surfaces are often bagged due to the rough shipping process from London to Australia. Consequently grades above MS64 can be quite scarce even though the coin is often given a Gem or FDC grading in Australia, microscopic hairlines typically result in a grading of around MS63 to MS64.
Due to the coin being well struck up and the general unfamiliarity many collectors have with grading George VI Commonwealth coins, one must be extra careful in differentiating a dipped circulated piece with a mint state coin.
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