Lady Vanishes, The (1938)
The Lady Vanishes is a 1938 British mystery thriller directed by Alfred Hitchcock and loosely adapted from the 1936 novel The Wheel Spins by Ethel Lina White. Iris Henderson (Margaret Lockwood), a young English turist in a fictional Central European state of Bandrika, befrends Miss Froy (May Whitty), a governess and music teacher who is returning home to England. While in train, Miss Froy mysteriously disappear, and other passengers are denying that she even existed. Iris and musician Gilbert Redman (Michael Redgrave) try to get to the bottom of the case.
The 1979 remake generally follows the same plot but is set in 1939 on German-Swiss border and made in more comedy style. The 2013 film The Lady Vanishes isn't a remake of Hitchcock's film but an adaptation of the original novel, without any espionage themes.
Smith & Wesson .44 Double Action
In the climactic scene several Bandrika officers carry Smith & Wesson .44 Double Action revolvers. An officer (Charles Oliver) in train is knocked out and disarmed by Gilbert Redman (Michael Redgrave) who uses the revolver and then gives it to Charters (Basil Radford).
Webley .455 Mk VI
Several of the officers are armed with Webley .455 Mk VI revolvers.
FN Model 1900
British lawyer Eric Todhunter (Cecil Parker), one of the passengers of the train, owns an FN Model 1900 pistol. In the climactic scene he refuses to use the gun, but Mrs. Todhunter (Linden Travers) takes away the pistol and hands it to Caldicott (Naunton Wayne). When the pistol runs dry, Gilbert Redman (Michael Redgrave) takes it, planning to use the gun to intimidate the locomotive engineer.
A pistol is used by Dr. Egon Hartz (Paul Lukas) during the climactic shootout. It is seen very unclear due to gunsmoke, but the promotional image allows to see the gun better. Walther PP seems to be a good guess.