Some vintage and classy zako to share...
I'm a big fan of the satin catsuit, whether it be on some expendable espionage enchantresses (Carry On Spying, Operation White Shark, Gerak Kilat) or daring cat burglars. Why not combine the two?
While Irma Vep gets credit for being the first. there is another French film that has a sinister henchgirl in all black...
Judex (1963) has an evil thief, Diana, who isn't afraid to hurt a few damsels that get in her way.
Here is the beginning of the heist. (Don't ask me about plot as it's a bit convoluted.)
Note, the absolutely gorgeous one-shot of Diana starting at 33:57 including a view of her...weapon ;)
I won't bother timestamping everything but there's a few points to make throughout the film.
The henchgirl is in love with her partner and she dons a few disguises throughout the film (a nun for one).
The big climax happens at 1:32:56 and I'll let you enjoy the fight (X_X )