Unidentified

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Brazilian poster of the film. Note the bandit is holding a Thompson Submachine Gun, this weapon never appears in the film.

The Red Light Bandit (Original Portuguese title: O Bandido da Luz Vermelha) is a 1968 Brazilian film directed by Rogério Sganzerla. Loosely based on the true story of the "Red Light Bandit", who comitted a series of crimes in São Paulo while carrying a red flashlight.
The following weapons were used in the film The Red Light Bandit:

Revolvers

Smith & Wesson Model 10

The "Red Light Bandit" uses a Smith & Wesson Model 10 with pearl grips. Detective "Big Head" Sade (Luiz Linhares) uses an Smith & Wesson Model 10 alongside a INA Model 953 when chasing after the bandit. A ganster is seen with a similar revolver. It is probably a Brazilian replica of the original Model 10.

Guisasola Hermanos G.H. Modelo 10 - 8x27mm SR
Spanish replica of the Smith & Wesson Model 10 quite common to see in Spanish and South American productions.

The "Red Light Bandit" fires the gun from a car.

Smith & Wesson Model 10 w/ 4" barrel - .38 Special

The gangster holds the revolver.

"Big Head" holds the Smith & Wesson Model 10.

Smith & Wesson .32 Ladysmith

The "Red Light Bandit" is seen handling what appears to be a Smith & Wesson .32 Ladysmith.

Smith & Wesson .32 Ladysmith - .32 S&W Long

The "Red Light Bandit" checks the empty cylinder.

The "Red Light Bandit" closes the cylinder before handing over the gun to a gangster.

The gangster carries the .32 Ladysmith on his holster.
Note the M-Frame that distinguishes it from a similar Smith & Wesson Model 10 seen in the movie.

Unknown Revolvers

Unknown revolvers are seen in the opening scene.

The boy holds the revolver, it is only partially a seen

A young boy holds a different revolver.

A young boy holds a revolver.

A young Jorginho uses an unknown revolver; it appears to be a Smith & Wesson (Possibly a M1917 or a hand ejector).

Jorginho holds the revolver.

"The Red Light Bandit" uses an unknown revolver, the weapon is also seen in the film's poster.

The "Red Light Bandit" holds the revolver.

The cylinder release can be seen in this shot.

The "Red Light Bandit" holds the revolver in a production still.

Lucho Gatica (Roberto Luna) uses an unknown revolver, it's only briefly seen.

Lucho is disarmed by the police.

A police officer uses an unknown revolver.

Pistols

Mauser C96

Jorginho "The Red Light Bandit" (Paulo Villaça) uses a Mauser C96 with a ring hammer and slabside receiver; it appears to be an early model C96 with hard rubber grips (Rather than the similar Italian Contract C99). It is also used by the Black Hand gang, in some scenes a stock is attached.

Mauser C96, early model with large ring hammer and slabside receiver - 7.63x25mm Mauser
This particular model was used by German police in South West Africa.

The "Red Light Bandit" dries his C96 after washing it in the sink.

The "Red Light Bandit" aims his gun at a church across the street.

The C96 is seen up close.

A better shot of the grips. This type of grip is mainly seem in early police contracts and pistols sold by Von Lengerke & Detmold.

Mauser C96 early model with large ring hammer, slabside receiver and stock - 7.63x25mm Mauser
This particular model was used by German police in South West Africa.

A gangster dry fires the C96.

A gangster holds a C96.

Submachine Guns

INA Model 953

The INA Model 953 is used by police. During firing scenes it is only seen from afar; it appears that no blanks were fired and the sound effects were added later.