Help identifying items on ingot pendant

[bytebit]

Hi there. Can you or someone you know who can tell me about the 5 symbols on the gold ingot. Any assistance will be greatly appreciated.

[AG2012]

Hi,
AG is sponsor`s mark unknown to me (maker)
crown is for gold
375 is gold purity of 9 karat – or 37.5 per cent pure
letter c is year 1977

Regards

[AG2012]

leopard`s head is for London assay office

[bytebit]

Hi,
AG is sponsor`s mark unknown to me (maker)
crown is for gold
375 is gold purity of 9 karat – or 37.5 per cent pure
letter c is year 1977

Regards

Thanks.