Question:
This is marked with an underglaze transferred bluish-black
GD & Cie
LIMOGES
FRANCE
Any ideas who they were, and when? Presumably after the McKinley Act took effect, but the style looks earlier than that.
Answer:
Do you have an image of the mark? That would certainly help.
GD could stand for Gerard and Dufraissex of Limoges, France. Cie stand for Company.
I don't have much info on French pottery.
Answer:
It's looking favourite for G. Demartine & Cie on this one. Around 1890-1910 was their period of production, so far as I can gauge.