But that’s a false example. The very fact that it was a “purse” indicates, especially in 1973, that the owner was a female and so “her” and “his” should have been used.
I remember 1973 very well, and guys did not carry “purses.” I knew someone who carried something similar just a few years ago that he called a “man sack” – which even he could not stop giggling about whenever he mentioned it – but he would not have been carrying even that in 1973. I contend that the only conclusion to a left-behind “purse” in 1973 was that the owner was female.