On-sale date from the Copyright Catalog of the U.S. Copyright Office with registration number TX0003729243.
This issue is a variant of Daredevil (Marvel, 1964 series) #321 [Direct Edition].
There exist further variants:
Daredevil [Matt Murdock]; Ben Urich; Doris Urich; Sara Harrington; John Garrett; Eddie Passim; Venom [Eddie Brock]; Nick Fury; Siege; The Snakeroot (villain); Harry Kenkoy (villain); Elektra (cameo flashback)