Both Sear and Grierson give these tiny pieces to Phocas but I think many today consider them imitative. I would catalogue it as "Egypt, imitative AE 12 nummi, type of Alexandria, c. early to mid-7th century, time of Phocas or later, possibly Arab-Byzantine, cf. Dumbarton Oaks Vol. 3.1, pp. 192ff, type 106; Sear BCV 679."
Sear states the problem in a note to his no. 679, "These pieces are of barbarous style and very crudely minted, and they never bear the name of Phocas in any recognizable form. Their attribution to this reign was suggested by Wroth in the B.M.C., and has been followed by Grierson in the D.O. Catalogue and by Hahn in M.I.B. It has been proved from hoard evidence that they belong to the early part of the Seventh Century, and it has also been suggested that some may be local irregular issues, or even products of the Persian and Muslim periods."
Although the first impression may be of a facing bust, the tiny coins always have a right-facing bust when the bust is fully discernible. This piece is not only tiny but as tiny as they come. DO lists 54 specimens, only 2 of which are 11mm with none smaller. The rest come in at 12 to 16mm.
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