Hi Michel,
Thank you for joining us here and posting this....welcome!!!
We have of course already discussed this stamped name with warranted and cast steel, which of course evolved into quite regular commercial use in various forms on tools, axes and edged weapons from about mid 19th c. it seems, perhaps even earlier.
The term cast steel had become seen on razors post 1772, and later on axes and knives exported to America. It is of course well known that the largest suppliers of Bowie knives in America were Sheffield sources.
The M1796 British light cavalry sabre was one of the largest in production it would seem and some of these were exported over a period of time, especially after they were superceded by the M1821 light cavalry sabres. However, they remained in favor, especially in colonial regions throughout the British Empire for the remainder of the century in many cases. Large numbers of these seem to have become surplus and entered many trade networks.
I admit I have not seen this kind of stamp on one of these before, but it seems to fall in place with the numbers of tools, axes, knives etc. which were exported to America in the 19th century carrying similar Sheffield oriented stamps. Despite there not being a great demand for swords in America, it is known that some were sent here probably among other materials if such case did exist.
This is of course a suggested possibility but with that information added to augment plausibility. The British M1796 did influence the Prussian M1811 Bluchersabel but only small numbers of these reached the Germans as far as I know. The numbers exported to other countries around 1814 of these were relatively small, actually only about 36 to America for example and in hundreds in most cases.
As I had discussed earlier in this thread, I had suspected this stamp might have been used in variation by the Bannerman 'surplus' complex in the early 20th century, where numbers of replicas were produced of certain type weapons, but I dont think these would have been among them. The stamping in mid center blade seems however strikingly similar, and perhaps may have served as a prototype for the Bannerman practice.
All best regards,
Jim