Worth about £1.04 as a proof. 26,552 were minted, the 13th lowest of any proof 1p.
13th/ 40
Its proof mintage of 26,552 is the 13th lowest of 40 proof 1p coins in the catalogue.

£0.10
Mintage 227,201,000
Royal Shield 1p 2012

£1.04
Mintage 77,725
Royal Shield 1p 2012 BU

£1.04
Mintage 26,552
Royal Shield 1p 2012 Proof (this page)

£626
Mintage —
Royal Shield 1p 2012 Gold Proof
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