Spoil not the ship for a penn'orth of tar.
Preston, Thomas, Dictionary of English Proverbs and...(2012)
All these colours can be bought in gigantic penn'orths at the oil-shops.
Nesbit, E. (Edith), Wings and the Child—or, the Buildin...(2012)
And them feet o' mine, they are a bit flat: but any chap can make a pair of insteps with a penn'orth o' rags.
Le Fanu, Joseph Sheridan, Checkmate(2012)