No relation to the real Secret Service- low $$$ handguns, most made by Iver Johnson for a reseller.
300$
Perils of the Secret Service - 1917 was released on: USA: 9 March 1917
Smith & Wesson did not mark any revolvers "Secret Service Special." Exactly how is your revolver marked? sales@countrygunsmith.net
The cast of Shorty Joins the Secret Service - 1917 includes: Shorty Hamilton as Shorty Anita Keller as Secret Service Agent
Sylvia of the Secret Service - 1917 was released on: USA: 25 November 1917 France: 8 July 1921 USA: 5 March 1922 (re-release)
The cast of Perils of the Secret Service - 1917 includes: Jay Belasco as Carson Huntley Kingsley Benedict as Yorke Norroy
I doubt that this story is true since Finland did not have secret service in year 1917. Finland was declared independent at 4th of December 1917. Organization which can be described as "secret service" was founded in 1919 (Etsivä Keskuspoliisi, Investigating Central Police in English/ Translation.)
Probably not a Smith&Wesson. More likely, the gun is marked for use with S&W cartridges. S&W never made a"Secret Service"model. If you can describe the gun in better detail,(length of barrel,how many cartridges does it hold,what caliber is marked on barrel,etc.)it's much easier to give a better idea on what the gun is worth.
Her Secret - 1917 was released on: USA: 30 April 1917
Your Winchester model of the U S model 1917 30-06 caliber rifle was produced by Winchester from 1917-1919.
Secret Servants - 1917 was released on: USA: 17 December 1917
The Phantom's Secret - 1917 was released on: USA: 14 May 1917