France 1849 - Very rare 20 centimes black canceled with a red grid on a letter. - Yvert et Tellier n°3

20 centimes black on yellow, very slight archival fold visible only with a magnifying glass, otherwise very beautiful, cancelled by the red grid of a magnificent color, on a letter without correspondence to Sarrebourg.
On the front, the departure date stamp type 15 "La-Petite-Pierre" (4th class distribution office) dated January 20, 1949.
On the back the arrival stamp in Sarrebourg on January 21, 1949.

Only known letter from this office in January 1849.
Magnificent composition. Signed Calves, Scheller and Baudot, with Certificate