Australia 1966-1984 5 Cent Struck on Underweight Planchet

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Coin Type:Australia 5 Cent
Grade:Uncirculated
Year:1966-1984
Mint:Royal Australian Mint
Metal:Cupro-Nickel
Mass (approx):2.6
Obverse:Queen Elizabeth II (Arnold Machin)
Reverse:Echidna (Stuart Devlin)

Unknown date 5 cent struck on 2.6 gram planchet, more than 0.2g under the correct weight. Planchet is thinned on one side leading to extreme weakness around one third of the coin and the date is completely missing. Unusual and interesting error.

Supplied in an archival Saflip.