I think it would be closer to truppence, 1/4 of a shilling.
That would be pronounced “thrup-ence” or a thrup-ny bit. The old coinage started with a farthing (10 made a penny), then a halfpenny (pronounced hape-ny, then a penny, then a thrupenny, then a sixpence (brides would put a sixpence in their shoe for luck on their wedding day), then a shilling (which was 12 pennies), then a 2 shilling piece, then a 2 shilling and sixpence piece, after that paper money (ten shillings, a pound, etc).