The initial picture on this post is currently on sale on Ebay with the following note:
"This is an original press photo. Female Boxing Introduced In Denmark" Copenhagen is usually associated with feminine blonde sex symbols but over the next six months the public will be exposed to a new kind of entertainment. It is female boxing in murky muddy rings at the ';Dyrehaven' Amusement Park a few miles from Copenhagen. Trained by former professional heavy-weight champions, Hans Joergen Jacboson, the band of girls slug their way through bouts much to the pleasure of their audience. Stripped to the waist, like all contest with a final at the completion of the six month season, and the loser have the humiliation of loosing their panties. it could never happens to Muhammed Ali. The winner of the bout goes on to the next round and the losers lose her panties. That's the the rules of the female mud boxers of Denmark. Photo measures 8.5 x 10. Photo is dated --none."
So now we know. Hopefully more photos will emerge-too much to hope that there is a video of the bouts-but we can but dream !