Re: world war 1 pistols.
The only reference book I have at hand, "Pistols of the World" by Ian Hogg and John Weeks, attributes the Stosel pistol to Retolaza Hermanos of Eibar.
The name Stosel apparently comes from a Russian general who's name is usually spelled Stossel in English. He was briefly famous during the Russo-Japanese war of 1904-1905, so your pistol may well pre-date the First World War.
According to the book, the Retolaza company disappeared during the Spanish Civil War of 1936-1939. They appear to have made average quality guns by Eibar standards, which were fairly low. The "S" could mean anything, or nothing.
Last edited by Lanrezac; 08-01-2012 at 01:42 PM..