"Danton" was a name used by Spanish gunmakers "Garate, Anitua y Cia" (GN)and "Gabilando y Cia / Gabilando y Uresti" (GU; better known several name changes later as "Llama") back in the 1920s, up to about 1930. The "Made in Spain" stamp dates it to 1923 or later. They made these in both vestpocket pistol .25 and larger .32 versions. You may find manufacturer initials on the pistol (the barrel, butt, and left or right tang are common spots) that will show who actually made this.
There may be proof marks on the pistol that will date it more closely -- Spanish/Eibar pistols began using a manufacturing year code stamp in 1927 (although it was not universally used for several years).
The "GC" monogram on the grips suggest this is from "Gabilando y Cia" but grips are too easily changed to be reliable, especially with these Eibar vestpocket pistols.