Leaving the photos for a moment, I've always liked this set of French postcards which are probably intended to show 1910's or 1920's ballet dancers or showgirls rather than a cancan performance. Innocent but mildly risque at the same time.
These are from EBay auctions:
http://www.ebay.com/itm/P1106-Early-postcard-Can-Can-Dancers-legs-U-B-Unused-/370871279128?pt=LH_DefaultDomain_0&hash=item5659a69e18
http://www.ebay.com/itm/X6059-Early-postcard-of-three-can-can-dancers-U-B-French-/360712854689?pt=LH_DefaultDomain_0&hash=item53fc295ca1
http://www.ebay.com/itm/X2549-Can-Can-Dancer-postcard-Three-women-legs-U-B-unused-/370871279191?pt=LH_DefaultDomain_0&hash=item5659a69e57
I'm not sure who the artist was. I don't see a signature. Xavier Sager perhaps?
