Watch List notes:

Victoria, proof 'Gothic' florin, 1880, crowned bust left, rev. crowned cruciform shields, milled edge (S.3900; ESC.2901), certified and graded by NGC as Proof-62, old-time grey toning with amber highlights, very rare Proof of Record
The only one graded as Proof-62 by NGC, none higher.

Estimate: 4500 - 5000 GBP