It's Spanish, manufactured by Orbea Hermanos, a copy of the S&W Hand Ejector M&P Third Model of 1905, made for the French in WWI and chambered for the 8.3X 27.5mm (8mm French Lebel) revolver cartridge. c3Shooter, your guess is almost correct but 8X50mm is the French Lebel rifle cartridge.
Your revolver is missing the tip of the ejector rod. The ring on the cylinder is from the cylinder stop being slightly out of time (releasing too early). I have a similar revolver manufactured by Trocaola Arranzabul y Cia for the French in 8mm Lebel caliber which exhibits the same cylinder ring. Whether this is from use or a design flaw is unknown.
Orbea and Trocaola were among the better quality suppliers of revolvers to the French and continued as successful manufacturers in the 1920's and early 1930's, but failed to survive the Spanish Civil War.
8mm Lebel revolver ammunition is currently manufacture by Fiocchi. If you handload, cartridge cases can be made by shortening and expanding .32-20 WCF cases and using .323 bullets using .32 S&W Long loading data.
Value of your revolver in the condition shown would be in the range of $100.00 to $150.00, particularly if you find a WWI collector who wants to fill out his collection.