Æ Threepence token. Diameter 24.2mm.  Uniface.   H - O - G  HOMERTON above and below 3D  Bold VF

H-O-G tokens were issued in denominations of 3d. (threepence), 6d. (sixpence) and 1/- (one shilling) as well as with the Roman numeral ‘IX’. No clear explanation can be given about their use and for which institution they were produced. They may have been used in Homerton College (1823) on Homerton High Street which moved to Cambridge in 1892.
 Taken from ‘The Mystery of the Homerton H-O-G’, Melvyn Brooks and Robert H. Thompson, in Hackney History, 14 pp. 50-51.  Presumably, they reasoned that the H-o-G was Homerton on Granta, the old name for Cambridge.
Homerton College is a constituent college of the University of Cambridge. Its first premises were acquired in Homerton, London in 1768, by an informal gathering of Protestant dissenters with origins in the seventeenth century. In 1894, the college moved from Homerton High Street, Hackney, London, to Cambridge. Wikipedia