Prt-622. Wt = 20.83g
Photo from Calssical Numismatic Gallery

Wt = 18.72g. Diam = ~25-26mm. 30 Réis or 1/2 Tanga, 1774
Photo from Zeno posted by Lingen

Wt = 21.05g
Photo from Numisma, sale 142, lot 220