Some where I have a FDL on a chart worth looking at~Noted as a French stamp pre revolution and also said to be a German mark... but also Birmingham as I recall...
See The Royal Navy Cutlass
Quote "Prior to 1800 the cutlass hilt was in the
form of a figure of eight or double disc, the grip was a cylinder of wrapped steel, the blade plain and straight, (mine is grooved)
and stamped with a
‘Fleur de lis’mark,probably (T Hollier 1720-1740) length varied, but around 28 to 29 inches (71-74cm)"Unquote.