Several daunting tasks lay before the creators of Vabank. It would be difficult to recreate pre-war Warsaw, a city that no longer existed. Warsaw, which was almost completely destroyed during the German occupation, was preserved only in old photographs; only a few buildings had miraculously survived the war.
It was decided that the movie had to be filmed in Łódż and its surroundings, where they managed to find a suitable atmosphere. For example, Kramer’s bank was ‘played’ by an old house in the small town of Piotrków Trybunalski, and the Łódż Grand Hotel was the hotel where Kwinto lived. Practically all of the old-fashioned automobiles, of which there were many in this film, were provided by private owners and enthusiasts of old cars. This was a huge help, considering the studio didn’t have its own lot of retro cars.
Casting the lead roles was even more of a challenge. Machulski really wanted to give the role of Kwinto to his father Jan. For Duńczyk, he envisioned Andrzej Łapicki, one of the icons of the Polish acting school. Łapicki and the elder Machulski had made a fantastic theatrical pair in the play Miesiąc na Wsi (A Month in the Country), directed by Adam Hanuszkiewicz. Kawalerowicz, however, did not see Jan Machulski in the role of Kwinto at all. The elder Machulski had an established image as a gentle, good, and intelligent man, far removed from grim safe-crackers like the legendary Goatee. During the preparations for the movie, Bronisław Pawlik and Roman Wilhelmi, both famous enough actors at the time, emerged as candidates.
Juliusz Machulski did not give in: he forced his father to do a screen test, forbidding him from covering his bald spot, which he was embarrassed by. From the screen stared out a gloomy man with an aloof face. After seeing the screen test, Kawalerowicz had to agree. As an experienced cinematographer, he immediately knew they had their Kwinto.
But Łapicki didn’t agree to play Duńczyk. That was when the name of Witold Pyrkosz, who many people knew from his role in Krzysztof Zanussi’s film The Constant Factor, came up in the studio. Leonard Pietraszak, who would play Kramer, was already famous as the valiant Colonel Dowgird from the television series Czarne Chmury (Black Clouds). Jacek Chmielnik, who played Moks, a young thief and Kwinto’s accomplice, was found by chance. The younger Machulski spotted him in a restaurant in Łódż. He recalled that this young man, dressed in 1930s-style clothing, was a student in the acting faculty. The director walked up to him and asked if he wanted to play a big role in his film. But Machulski set this condition: Chmielnik had to answer right away, without reading the script. Chmielnik agreed to what would become his most famous role.
Machulski very much wanted for the police officer who lives with Kwinto’s wife to be played by Jerzy Stuhr. They were barely acquainted at the time and were still on formal terms, therefore when the director went to offer the actor the role, he didn’t even bother listening to him. Machulski simply wasn’t very convincing: he couldn’t even clearly explain what kind of movie he was making. In later years, Jerzy Stuhr would go on to play some of his most famous roles in Machulski’s films, and would ironically recall this situation, scolding the director for not being able to tell him about his concept in a coherent matter.
There were many disputes during the filming as well. For example, Machulski wanted to begin Vabank with a scene showing the murder of Tadeusz, Kwinto’s friend, who is thrown out of a window by a hitman sent by Kramer. Kawalerowicz was against it. He said that Vabank was a comedy, even though it may be about thieves. And a comedy should never begin with a dark scene, as the beginning sets the tone for the whole film. As a result, the film opens with a scene that became a classic, in which Nuta and Moks rob a jewellery store. There was originally yet another heist in the script. Machulski wrote a scene where Kramer and Kwinto rob a bank and the police catch them in the act, but he later abandoned this idea. The reason was simple: Machulski didn’t know the kind of man Kwinto had been before his six years in prison.
The image of Kwinto was the biggest discovery for the Machulski father and son. It took a huge effort to conceive this reserved, laconic, yet madly charming protagonist. Juliusz forbade his father from smiling, drastically reduced his character’s lines in the script, urged him to speak in a low voice, even though earlier Jan Machulski had specifically spoke with a higher intonation when on stage and screen. In the entire movie, Kwinto only smiles once – after he opens the safe in Kramer’s bank. This smile is memorable to all viewers. Jan Machulski imagined that his character had a nervous tic which would appear during tense moments, and he also convincingly portrayed playing the trumpet, even though he had never played the instrument before in life.