Skinny Tote (with lining and rounded handles), circa 1967-1973
This style started out with striped lining, which changed to black lining in the early 70s. In 1974, the handles changed shape and the bag was produced in unlined glove tanned cowhide.
Photos courtesy of @hopesparkles
Ad from 1967 (Note that the very earliest version had feet)
Original Cashin sketch, courtesy of the UCLA Library
Hint: on desktop, right click and open images in new tab for enlarged photos