MANCA, was a square piece of gold coin, commonly valued at 30 pence; and manca was as much as a mark of silver, having its name from manu causa, being coined with the hand: (Leg. Canut.) But the manca and manca were not always of that value; for sometimes the former was valued at six shillings, and the latter, as used by the English Saxons, was equal in value to our half crown. Manca sex solidis aestimetur, (Leg. H. i. c. 69.) Thorn in his chronicle, tells us, that manca est pondus duorum solidorum et sex denariorum; and with him agrees Du Cange, who says, that 20 manca make 50 shillings. Manca and manca are promiscuously used in the old books for the same money.