Decorations with speckled dots ("stippled" blade decoration) are known from luxury blades of Zlatoust (Russia) and were probably introduced there in 1816 by the master sword smith Wilhelm Nikolaus Schaaf, an emigrant from Solingen. Below you find two links to examples in the State Hermitage Museum in Saint Petersburg.
https://www.hermitagemuseum.org/wps/...c+armor/661213
https://www.hermitagemuseum.org/wps/...c+armor/668168
I know only few examples of very late 18th and early 19th century French blades with this kind of decorative element. As you can see on the sabre blade of General Kellermann (Link) and on the blade of Colonel Soulès Honour sabre (Sabre d'honneur) dating 1801 (picture attached).
https://collections.isere.fr/fr/muse...&pgn=7&pos=115
The sabre attributed to General Kellermann is said to have been worn by him at the Battle of Valmy on 20 September 1792. I am confused about the dating of this sabre or at least of the blade. Due to the blade shape and length as well as the blade groove all the way to the tip and the engraved pyramid, I would not have estimated this blade earlier than the second half of French Directory (1795-1799).
Accrording the "Musée de la Révolution française" Kellermann gave this sabre to his aide-de-camp, General Rigaud, who then passed it on to Sergeant de Gaulle, and bequeathed it to his grandson Frantz Goerg. This sword was apperently authenticated by Marshal Kellermann's granddaughter, Princess Ginetti born Henriette de Valmy in 1892, during an exhibition for the bicentenary of the Battle of Valmy (in 1992).
The time from 1792 to the authentication of this sabre in 1992 is very long and carries the risk of error and misunderstanding.