The Willi[am] Sommers

This trade token, worth a half penny, was issued for a business at the sign of William Sommers, in Old Fish Street (now Knightrider Street).

Boyne & Williamson (1889) reference London number 2147; Obv inscription: AT.YE.WILL.SOMERS. BACKSIDE (around field, in Roman capitals) Device = Will Somers in a long gown and hat blowing a horn OB (initials in field to right of device, in field); Rev inscription: OVLD. FISH. STREET. 1666 (around field, in Roman capitals) Device = I.M.W. (triad of initials in Roman capitals, in field).

William Sommers, depicted on the sign at the issuing business, was a court fool, at the court of Henry VIII, see Oxford DIctionary of National Biography (J. R. Mulryne, ‘Somer , William (d. 1559)’, Oxford Dictionary of National Biography, Oxford University Press, 2004 [http://www.oxforddnb.com/view/article/26029, accessed 23 Nov 2011]).
See also token number 7453 in the Sylloge of Coins of the British Isles, 59, The Norweb Collection: Tokens of the British Isles 1575-1750, Part VII - City of London. Old Fish Street (now Knightrider Street), lay in Bread Street Ward and Queenhithe Ward, in the City of London.