Help Identifying Ancient Coin

I am in the middle of going through a collection of for a family friend and there is one coin that I can't identify. I know little to nothing about ancient coins. Any help regarding attribution or value would be helpful. Thanks in advance. 3.5g 22mm
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Comments
Appears to be an antoninianus of the empress Salonina, wife of Gallienus. Reigned 253 to 268.
The reverse reads Juno Regina. Catalogued as 2940 in my old Sear reference.
DPOTD
@harasha
Thanks for the info
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