Watch List notes:

(x) Elizabeth I (1558-1603), sixth issue 1583-1600, Pound of Twenty-Shillings, 11.11g, bust 7A, m.m. tun, elizabeth d g ang fra et hib regina, crowned bust left with long hair and richly ornamented dress, rev. scvtvm fidei proteget eam, crowned square-topped shield with e r at sides, colon/double annulet stops (Brown & Comber F4; Schneider 798 (same dies); N.2008; S.2534), very slightly double struck on obverse, the dies of exceptionally fine workmanship, extremely fine, very rare thus, probably the finest known example.

Spink Numismatic Circular, May 1942, no. 14270 (“almost perfect”)
Marshall collection, Spink auction 167, 31 March 2004, lot 17

Brown and Comber suggest that Seaby Coin and Medal Bulletin, April 1973 (G2378), a die duplicate of this coin, may have a lion erased from the obverse die above the crown, but there is no trace of an erasure on this finer example.
Estimate: £15,000.00 - £20,000.00