Silver tetradrachm, 28mm, 13.98gm, issued 294-285 BC Alexandria mint.
Obv: Diademed head of Ptolemy I right wearing aegis.
Rev: ΠTOΛEMAIOY BAΣIΛEΩΣ, Eagle standing left on thunderbolt, P Φ in left field.
References: see Sear 7762, CPE 151.
Banker's marks on obverse and reverse.