Watch List notes:

William the Conqueror (1066-87), Penny, 'Bonnet' type, Leicester (formerly attributed to Chester), Frithgestr, 1.36g, 5h (to m.m.), rev. + FRIDEGIST ON LEI (SCBI [Grosvenor], 396 [Chester]; and SCBI [Mack], 1357 [Chester]; N.842; BMC II, and no. 80; S.1251), a striking and handsome coin, a pleasingly good very fine.
Provenance
The Isladulcie Collection of Medieval Pennies and Fractions
Ernest Danson, DNW 68, 12 December 2005, lot 184 (and on front cover)
W J Lawson, Glendining, 19 July 1954, lot 102 [with his ticket]
Spink Numismatic Circular, 1948, pp. 249
, ,
For the reattribution to Leicester, see Allen, BNJ 82 (2012), pp. 55 and 75
Estimate: £1,200 - £1,500