RARE GB 1905 Edward VII Penny Coin with (Mint or Mint Error)

For your perusal is a RARE GB 1905 Edward VII One Penny Coin with (Mint or Mint Error). The One Penny coin has a marking close to left of "1" of "1905". The Coin is presented in a Coin Sleeve. Was this coin from a subcontracted Mint or a Mint Error?.

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