Good set unknown hallmarks to base, French in origin. It measures 31.5cms x 19cms x 4.2cm high ends. A lot of wear, marks & scratches mainly to the base.
The literature information about Gallia is scarce and often misleading. As an example, I can mention the article "Christofle: Marks & History" on the famous web page "Online Encyclopedia of Silver Marks, Hallmarks and Makers' Marks", where the marks for Christofle silver-plated Alpacca-based hollow ware, silver-plated Alpacca-based cutlery and silver-plated Gallia-based items are mixed together and their dating is often incorrect. It should be noted that Christofle used for the Alpacca alloy its own trade mark Métal Blanc (White Metal). The author of the above-mentioned article (under the pen-name "2209patrick") wrote that in November 2007 he contacted the curator of the Musée (Museum) Bouilhet-Christofle in Paris about the precise dating of some marks and is still waiting for an answer. This Museum was closed in November 2008 and that probably was the reason why this web page was never updated.
The first Gallia products were proposed at the end of the XIX. century by Manufacture de L'Alfénide (Alfenide Foundry, where Alfenide is simply another brand name for Alpaca or Neusilber), which was belonged to Christofle since 1888. However, rather than integrating this acquisition, Christofle allowed it to continue trading under its own brand as a separate entity. An experienced French goldsmith, Félix Chéron, was invited to manage the Alfenide factory. Later he was commissioned to create a new line of cheap tin-based silver-plated products. The idea was that such a new enterprise was rather risky for Christofle, who at that time dominated on the French market of luxury silver-plated products, and it was decided to introduce the new product under the name of Alfenide. Therefore, on all newly-produced Gallia items the Alfenide mark for silver-plating, a profile of a goat inside a rhombus in a square box, was used. However, once the production proved to be successful, the Alfenide mark on Gallia objects disappeared and instead the Christofle mark for silver-plating was used.