4 extrafine Roman Tetradrachm coins from Egypt Alexandria

A lot of really interesting and scarce Egyptian tetradrachms from the Roman Colonial period. Incl. In the lot a large and beautiful tetradrachm of Philip I (12,25 gr.), a finely patinated tetradrachm of Severus Alexander (12,53 gr.) and two later tetradrachms from around Trebonianus Gallus and Gallienus period. Unresearched group of 4 coins in excellent conditions!