Watch List notes:

British Tokens, Eighteenth Century Tokens, Buckinghamshire, Slough, W. Till, halfpenny in brass, 1794 [i.e. c.1838], family arms and motto, rev. the Red Lion Inn, W. TILL above entrance (DH.23), good extremely fine with residual lustre, extremely rare, believed only the fourth example recorded in brass
*ex Baldwin's vault
Estimate: 100-150 GBP