This issue has variants.
The on-sale date is the publication date reported in the U. S. Copyright Office filing.
An earlier indexer provided an on-sale date of September 14. No citation was given, although another indexer notes that it matches a listing in the fanzine The Comics Reader.
Verpoorten cover inker credit provided 2006 by Nick Caputo. Marvel Comics Index #8A lists inker as Frank Giacoia and Gaspar Saladino as letterer.