Help Understanding Hallmarks on Gold Ring

by Kevin A
(Scotland)

Hi,

Currently trying to identify some information about a 9 carat gold ring, hallmarks are as per the attached image, the assay office appears to be a panther for London, however the date stamp (T) doesn't appear to match any stamps found so far, as its a very straightforward capital T.

Likewise the makers mark AC Co doesn't really pull up many results other than the one a few threads ago...

Any assistance dating this would be gratefully received.

Thanks,

Kev