I just got this coin with an old collector tag saying it was from the Freckenham Hoard of 1948 (I have attached the pdf from The Numismatic Chronicle-- see the link under the picture); which contained almost 600 Constantinian era coins. The tag has this one as unofficial; which I agree with, though the style is very good.
Constantius II
A.D. 348- 350
21mm 5.0g
DN CONSTAN-TIVS P F AVG; pearl-diademed, draped & cuirassed bust right.
FEL TEMP REPARATIO; Emperor in military dress stg. l., holding phoenix on globe and standard with [Chi-Rho]; in stern sits Victory, steering ship.
In ex. SLG
cf. RIC VIII Lyons 69
