Watch List notes:

British Tokens, Eighteenth Century Tokens, Middlesex, [John] Skidmore (2): halfpenny, 1795, register stove, FURNISHING REPOSITORY, NO 123 HIGH HOLBORN, rev. men working at forge, CLERKENWELL (DH.480); farthing, 1795, from the centres of the same dies as previous (DH.1074); [Paul] Skidmore, mule halfpenny, undated, family arms, DEALER IN COINS MEDALS, 123 HIGH-HOLBORN, rev. open bible (DH.517), good extremely fine, DH.480 with some lustre, two tiny verdigris spots on reverse, from the flawed die, DH.1074 with corrosion patch and minor grazing in reverse field, DH.517 patinated, small area of verdigris on obverse, die cud on reverse, DH.1074 rare (3)
*ex Baldwin's vault
DH.517 is not extremely rare: its 'scarce' rating on p. 152 of DH is referred to by Atkins's number, 397.
Estimate: 130-180 GBP