Watch List notes:

(g) MS64 | Victoria (1837-1901), 'Shieldback' Sovereign, 1871, die number 30, Type 1b, edge milled, 7.98g, 6h (Marsh 55; Spink 3853B), some surface friction, otherwise lustrous and quite brilliant and lustrous, extremely fine with a hint of die clashing, in NGC holder, graded MS64 (Cert. #6295129-004).
Provenance
The Lansdown Collection of Guineas and Sovereigns,
Estimate: £500 - £800