Does anyone know how I can identify a mug that I have found on a river bank in Southern France. It is very basic in design, currently marked because of it's recent association with chalks/silts etc from the river. It seems to have a raised 3d image of a French military subject (possibly Bonaparte), the only other identifiable feature being an anchor of the picture of the subject. It has a stamp on the base as shouwn on the accompanying jpg.
Any help would be appreciated.