I found the below. It may be French...
UNION PISTOLS
The UNION pistols were developed by a gunsmith from Marseilles, Mr. Marcel Seytres. His workshop was located at 17 Rue Denis Papin in St. Etienne.
The first UNION pistols appeared around 1925 and production ceased a bit before WW2.
These pistols have numerous common points with the 1906 Browning. This type of weapon was very popular between the two World Wars and numerous French, Belgian and Spanish manufacturers were inspired by it.
This manufacturer (UNION), nonetheless brought improvements as evidenced by the numerous patents that we have discovered.
Upon examination of a Seytres manufactured pistol, is obvious that the manufacturing was of very high standard and this had led the administration and certain organizations to equip their personnel with this pistol. The company seemed to be doing well since, following the fire that destroyed gun maker Societe d’Armes et de mecanique Generale of the city of Louhans, mr. Seytres hired part of its personnel, including two Spanish foremen: Mr. Larena (machining operations) and Mr. Etchebum (Assembly operations).
At the time, daily production was around 50 pistols in 7.65 French Long in order to participate to the French army trials of 1933.
There were two models with unlocked breach similar to the Spanish STAR and one locked breach similar to the 1911 Colt.
The results of these trials are described in part three of this article. Later still, the Seytres company built Colt inspired pistols in 9mm Parabellum (Luger) and in 7.63 Mauser for the civilian market under the brand name of UNION-FRANCE.
Some of these weapons also incorporated a fire selector and an adjustable rear sight. The firm apparently tried to sell these weapons to foreign countries, particularly to China, as a 1941 report by the Shangai city police shows. One can encounter UNION pistols marketed under the names FURIA, GALLIA and VERNAY-CARRON.
These pistols must not be confused with Spanish –made UNION I and UNION II brands (Made by Esperanza y Unceta in Guarnica) which are, strangely, marked in English
UNION PISTOL IN 6.35mm (.25acp) SIX SHOT.
This is a small weapon, of simple but good quality manufacture. Its shape is elegant, with an “aerodynamic” rear end, slightly thicker slide faces where the markings and grasping ribs are located. The markings read PISTOLET AUTOMATIQUE FRANÇAIS “UNION” FABRIQUÉ À SAINT ÉTIENNE CAL. 6,35
UNION pistols feature an automatic magazine safety to prohibit percussion when the magazine is removed, and a safety lever on the left side above the trigger.
Top Photo caption: Although the grips installed on UNION pistols have various contours, they all share the same markings. One can see the brand in a banner on top, and lower, a medallion with the feathered Indian head and the words “Trade Mark”.
KJ