Watch List notes:

London, Saltpetre Yard, W.B., farthing, 1653, At The Cock (W.2741), a little corroded, good very fine, extremely rare
The only issue of this location, and not represented in the Norweb collection. The location could be Saltpetre Bank, between Rosemary Lane and East Smithfield (see Morgan's street map of London of 1682). (£100-150)