Goofs

In one scene Marguerite sings on an Edison Cylinder recorder, later her recording is played back from a 78 RPM disc record, supposedly the same recording.

Placed in Paris starting from September 1920, and with an almost faithful commitment to the period, except for the sequence when Marguerite, Baronne Dumont sings whilst motion picture images are first projected onto a white sheet and then onto her white clothing. Incorrectly there is the use of a 16mm silent movie film that appears to be projected from a 16mm film projector, however 16mm film was not invented by Eastman Kodak in the USA until 1923. In France in 1922 Pathé Frères invented their 9.5mm silent movie film as part of the Pathé Baby amateur film system, which would have been more likely to be in use in this era.

For the era the incorrect number countdown leader is projected, and any fully trained projectionist would notice the error, and in 1920 we see the 1965 "SMPTE Universal Leader" that was designed and used for television projection applications. Featuring a continuous countdown from eight to two (measured in seconds, rather than feet), with the numbers in the center of a target with two white circles and a rotating "clock arm" animation. "SMPTE Universal Leader" did not gain widespread acceptance theatrically which still used from 1930 "The Academy Leader", and from 1951 "The Society Leader" (both are 16 frames/foot in 35mm film), counting down from eleven to three, and a quick beep is heard at three, with all the numbers appearing upside down. The words 'SIX' and 'NINE' usually appear below their respective numbers.

The Academy leader is specified by SMPTE 301.[1]. The Universal Leader is specified by ANSI/SMPTE 55.

The Society [aka All-Purpose] Leader (1951) is quite complex in design, and is recognizable by its circles with slender arrows pointing to the sides, top, and bottom of each frame (akin to cross-hairs). The numbering is from 11 to 3, but oriented the correct way up, however the SIX and NINE appear as words only. The numbers are again spaced at one foot intervals, i.e. at every sixteenth frame, with 'echoes' of each number in the immediately adjacent frames (so each number actually appears thrice). The Universal [a.k.a. Television] Leader (1965) is the most widely recognized with the familiar 'clocksweep' animated graphic, and the numbering used is from 8 to 2 and with duration of precisely 8secs@24fps. All numbers are the correct way up, and are spaced at 24-frame (1 second) intervals. Since the number 9 has been eliminated, the 6 appears only as a numeral.