Double Entry Swinger, circa 1970-1974
The lining for this style was initially done in Bonnie's stripes, but as with other styles in the early 70s there was a switch to solid black lining. The striped lining appears to have been used circa 1970-1972, and the black lining circa 1972-1974.
Photos courtesy of @hopesparkles
Photos courtesy of @bonniewouldwearthebag
Ad from 1970
Ad from 1973
Very similar is the Small Double Header, introduced in 1966 with chain straps. These two styles coexisted for a brief period in 1970. Photo courtesy of @oldboldbrass
Swinger Timeline