Watch List notes:

Victoria (1837-1901), Proof Crown, 1839, young head left, rev. en médaille, crowned shield within wreath, edge plain (L&S 38; ESC 2560 (279); S.3882), once cleaned and bagmarked with some light rim bruising, nonetheless a bolder very fine, rare.
Note similar 'pocket-piece' examples of this seminal Victorian Crown issue are to be found in the Pywell-Phillips collection (Spink 257, 30-31 October 2018, lot 561 - £4,000) and also in Spink 248, 25 September 2017, lot 975 - £2,800
Estimate: £2,000 - £2,500