Stone ?
quarter qtr 12.7 kg 2 stone = 1 quarter
4 quarters = 1 hundredweight This is a quarter of a hundredweight, not be to confused with a quart, which is a quarter of a gallon. There is also a volume unit called a quarter which was supposed to be a quarter of a chaldron and also a quarter of a yard.
A tod was the same weight as a quarter. It was used to measuring wool.