This issue is a variant of The Avengers (Marvel, 1963 series) #193 [Direct]. There exist further variants.
In The Avengers #197 letters page, Michelinie writes that Frank Miller "was able to add some identifying details to Sal Buscema's pencil art." This information added 2005 by Steven Tice.
Letters on The Avengers #189. Letters from Anthony Carlson, Charlie Ehrenpreis, Eric J. Szulczewski, Warren K. Tong, Todd Benedict, Don Garvin, Joe Pearson
Date of filing: October 1, 1979. Average number of copies of each issue during preceding 12 months (net press run): 428,935, single issue nearest to filing date: 431,125.