Hiya, these were semi official sports medals given out to girls of the ATS who took part in sports competitions. Different types can be found.
The medal is bronze and features the ATS cap badge design on one side, while in this case the reverse features the Anti-Aircraft Command bow & arrow insignia.
This medal was given to runners up in a Netball Tournament organised by the 1st Group of AA Command in 1946.
I always wanted one of these after a Veteran friend showed me hers!