Ah yes, the satisfying smack of an open palm against plump female hindquarters, the mingling of pain & pleasure, the rosy hue of recently buffeted flesh - the joys of spanking are manifold.
As legal erotica slowly diversified in the 1960s a subgenre of spanking photography arose, descended from the light Parisian BDSM of Biederer Studio but its own distinct thing. One point of departure was that many of these newer producers were now based out of Britain and for a distinctly British audience - one could argue that something of the English character (an emphasis on social rectitude and punishment?) was fertile ground for this sort of erotica. Whatever the case, photographers distributed their material both by mail order (ads typically in the back of men's magazines) and in a couple short-lived periodicals themselves. The quality of these varied, but though they never achieved the artistry of the Biederer or Ostra Edition works, they've still got a certain charm & sexiness.