Slim Satchel, circa 1974-1987, ~1993
This bag was introduced as the Slim Satchel in 1974, with a name change to Slim Satchel Standard in 1980, and then Slim Satchel Large in 1985. The same style number (9430) was used for all three names.
Photos courtesy of @myfunkycamera
Ad from 1974
Ad from 1977