Help with maker, missing hallmark

[mintymin]

Hi everyone
I am hoping you can help me again.
I have a lovely new pendant and I can only see the end of the hallmark.
Does anyone recognise the maker by any chance? I think it looks like FD LD which probably means Limited.
As always I am grateful for any help
Thanks you

[spobby]

Could be Constantine & Floyd Ltd, Birmingham
Regards
John

[AG2012]

Hi,
I think half of the mark is missing.
It looks like the right side of Constantine & Floyd Ltd (one of many marks they used).



Besides, it is 1911 as far as I can tell, and Art Nouveau style, matching the period of their activity.
Regards

[mintymin]

Thank you both. That’s amazing knowledge, I will update my records with that info.
I started looked through but it was just a guess what the first letters might be.