Fashion Lighting: Nighttime

I'm looking to learn how to shoot fashion at night using motion. Can I get pointers on exposure time, as well as front curtain vs rear sync for the following 2 pics please.
I had no way to reach the original photographers. Images are from Pinterest . Thank You

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Model testing

This image was done in late 1980s on Polaroid's instant slide film Polapan - a prefect film for beauty and boudoir photography as skin tones were rendered silky.