You have to take a close look to these two photos. In the first photo the brunette is wearing the striped corset, in the second photo the mistress from the first photo (at least that is what I think) wears the white striped corset, the brunette wears a different outfit. Some mention these photos are tributed to photographer André Kertesz, so far I could not find erotic photos with the same vibe from this photographer. Also the boots, corset and lingerie in these 4 photos can also be found in other photos that are for sure done by Biederer.
*Updated December 17, 2020
Then there is a third photo where this corset appears, which seems to be in a completely different setting, with three models in total.